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caltech.edu favicon caltech.edu

Excellent Practice33
Improvement Could be Made9
Critical Issues to Attend9
Jan 7, 2023 08:01 PM

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Recommended Actions

  • Set meta keywords.
  • Create one H1 element for your page, put the most important keywords in.
  • Use more straight forward terms, avoid using too much jargon in the page content.
  • Create and add a robots.txt for your site.
  • Create a XML sitemap for your site.
  • Move the 27 inline css components to an external style sheet file.
  • Reduce number of links to other pages.
  • Implement HTTP compression for your site.
  • Implement browser caching for your site.
  • Use HTML headings(H1 - H6) and inline emphasis tags (<EM><B><I><EM><STRONG>).
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Detailed Reviews

Related Category
Most related categories of this website.


Title
Home | www.caltech.edu

Words count: 4    Unique Words: 4    Length: 41 characters
[ To optimize the page title, Use this SEO Title Optimizer ]

Excellent! the title contains 1-12 words, and within 10-70 characters!

The title will be displayed in search engine results in the form of a direct link to the site.

Tips:
1. ideally, the title should contain 10 to 70 characters, including spaces. (Google displays up to 70 characters in the title, and takes into account only the first 12 words.)
2. put the most important and relevant keywords in the title, try not to repeat any word.
3. each individual page should have a unique title.
Description
The California Institute of Technology aims to expand human knowledge and benefit society through research integrated with education.

Words count: 18    Length: 133 characters
[ To optimize the page description, Use this SEO Meta Description Optimizer ]


Excellent! Your meta description contains between 70 and 160 characters.

Meta Descriptions provide concise explanations of the contents of web pages, that are commonly used by search engines on search result pages to display preview snippets for a given page.

Tips:
1. it is best to keep meta descriptions between 70-160 characters.
2. a readable, compelling description using important keywords can draw a much higher click-through rate of searchers to the given web page.
3. avoid keyword stuffing, ensure each page has its own unique description.
Google SERP Preview
Home | www.caltech.edu www.caltech.edu/
The California Institute of Technology aims to expand human knowledge and benefit society through research integrated with education.

[ To optimize this Google SERP preview, Use this Google SERP Optimizer ]

This is how your site looks like in Google Search Result Page.

an optimized SERP snippet will have a higher click through rate.

Tips:
1. make sure the title is clear, simple, straight to the point.
2. make sure the description is relevant and properly summarized the page content.
Keywords
Words count: 0    Length: 0 characters    keyword phrases count : 0

Meta Keywords is not set.
[ To optimize the meta keywords, Use this SEO Meta Keywords Optimizer ]

Meta keywords should not be ignored, though they are not a major ranking factor for most of search engines nowadays. A Meta keywords tag is supposed to be a brief and concise list of the most important themes of your page

Tips:
1. keep your list of keywords or keyword phrases down to 10 - 20 unique words or phrases.
2. separate the words or phrases using a comma (you do not need to leave a space between words separated by commas).
3. do not repeat words or phrases.
4. put your most important word or phrases at the beginning of your list.
Keywords Cloud
This keywords cloud gives your an idea of what are those important keywords appears in your website.

academic  admissions  aid  alumni  apply  california  caltech  campus  center  chemical  click  diversity  education  engineering  events  explores  graduate  history  humanities  institute  interactions  january  laboratory  life  mathematics  medicine  observatory  open  physics  programs  read  science  social  space  students  studies  submenu  technology  theoretical  undergraduate 

Top 20 Keywords
Total Terms Count: 1,753

It is nice! the word density is quite ok.

Top 20 terms occurance and density
KeywordIn DomainIn TitleIn DescriptionIn Heading In Body Density
caltech 66 3.76%
center 49 2.80%
institute 32 1.83%
science 26 1.48%
technology 17 0.97%
open 16 0.91%
submenu 16 0.91%
observatory 14 0.80%
academic 13 0.74%
january 13 0.74%
engineering 12 0.68%
admissions 11 0.63%
physics 10 0.57%
space 9 0.51%
history 8 0.46%
aid 8 0.46%
read 8 0.46%
campus 8 0.46%
studies 8 0.46%
students 8 0.46%

keyword density can be used as a factor in determining whether a web page is relevant to a specified keyword or keyword phrase.


Tips:
1. the optimum keyword density to be 1.0% - 3.0%. Using a keyword more than that could be considered search spam.
2. overuse of keywords, a practice called keyword stuffing, will cause a web page to be penalized.
Highlight
<H1><H2><H3><H4><H5><H6><B><U><I><EM><STRONG>Total
05950000110030

Excellent! The page is using HTML headings (<H1> - <H6>) and inline emphasis tags (<EM><B><I><EM><STRONG>)

<H2>

(5)
Featured Events
Life at Caltech
Jet Propulsion Laboratory
Connect With Us

<H3>

(9)
Did You Know?
RSI Research Seminar
Red Cross Blood Drive
Red Cross Blood Drive
NASA Explores a Winter Wonderland on Mars
Nayla Abney
David Ignacio Fager
Ralph Adolphs
Katherine de Kleer

<H4>

(5)
@Caltech 1d
@CaltechAstro 1d
@NASAJPL 2d
@AAUniversities 2d
Caltech's Commitment to an Inclusive Environment
<I> (11)Caltech does not discriminate or permit discrimination by any member of its community on the basis of sex, race, color, religion, national origin, citizenship, ancestry, age, marital status, physical or mental disability, medical condition, genetic information, pregnancy or perceived pregnancy, gender, gender identity or expression, sexual orientation, protected veteran status, or any other characteristic or condition protected by state and federal law.
It is Caltech's policy to provide a work and academic environment free of discrimination as required by federal and state law and to provide equal opportunity in matters of employment and in education programs, services, and activities, including the administration of its admissions policies and other university-administered activities, programs, or funds. 


HTML headings and emphasis tags are the most basic forms to indicate important content.

Tips:
1. use your keywords in the headings and make sure the first level heading (<H1>) includes the most important keywords.
2. never duplicate the title tag content in the heading tags.
3. for more effective SEO, use only one <H1> tag per page
Reading Level
0

The page text content is a bit too difficult to be read and understood!

Ensure your page content text can be read and understood by most of your site visitors. not too difficult nor too simple.

Tips:
1. a score below 30, indicates the text content is too difficult to be read and understood.
2. a sore above 80, may suggest that the site is lack of in-depth and expertise of its topics (low quality content).
3. an optimal reading level score shall be 50-70.
Language
en Excellent! the website declared its language in use.

the detected language is : en

Declare the language in use can help search engine to better understand and rendering your page, especially when special characters are encountered.
Page Encoding
utf-8 Excellent! the website declared its character encoding.

Declare the character encoding can help search engine to better rendering your page, especially when it comes to
non-asii characters.
Favicon
Excellent! the website has a shortcut favicon image.

RSS
the website does not have a RSS Feed.

Robots.txt
Robots.txt is not presented for the site.

Robots.txt file can be used to regulate access of search engine crawlers, properly configured robots.txt file can help
crawlers to better understand your website.

Tips:
1. grand robots access to those pages you wish them to crawl.
2. restrict access to those pages you do not wish search engines to see and crawl.
XML Sitemap
XML Sitemap is not presented for the site.
[ To generate XML sitemap, Use this XML Sitemap Generator ]

Sitemap helps search engine crawler to identify your website pages.

Tips:
1. ensure all your important pages are listed in the sitemap.
2. ensure to indicate the frequency of change and importance of each url.
3. inform search engines of the location/URL of your sitemap (eg, For Google, you can set the website sitemap location through Google Webmaster management panel).
Loading Time
1.56 seconds - 40.83 Kb/s

Excellent! the loading speed is pretty fast!

Estimated loading time for different internet connections
Modem
(56Kbits/s)
Mobile/HSDPAM
(7.2Mbits/s)
ADSL
(8Mbits/s)
Cable
(30Mbits/s)
Optical Fibre
(100Mbits/s)
9.10 s 0.07 s 0.06 s 0.02 s 5.10 ms

Site speed is becoming an crucial ranking factor. Slow page loading is one of the biggest complains of web users. If the loading time is too long, you may need to check your server, network, or system codes and structure.

Tips:
1. ideal loading time is less than 1 seconds, if it take more than 5 seconds to load your site, likely users will run out of patience, so do search engines.
2. improve your SEO by optimizing your website to have a small size and faster responding server.
Total Size
64 Kb (63,689 bytes)

Excellent! the page size is just nice, that is within 30K-150K!

Page size affects the speed of your website.

Tips:
1. try to keep you page size between 30K-150K
2. put javascript and style sheet in separate files, and link them to the main page.
3. use optimized images for web and set up your server with gzip for downloading
Text To Code Ratio
Total Size Text Size HTML Code Size Text/HTML Code Ratio
64 Kb (63,689 bytes) 14 Kb (14,358 bytes) 49 Kb (49,331 bytes) 29.11 %


Excellent! the text to html code ratio is just nice, that is within 15%-70%!

the ratio of text to HTML code should always be above 15% for good SEO gain,
it is below 15% then that means that your website probably needs more text content.

Tips:
1. a ratio between 25% and 70% is ideal, when it goes beyond than that, the page might run the risk of being considered as spam. As long as the content is relevant and gives essential information, it is a plus point to have more of it.
2. improve your SEO by adding more relevant text to your pages and also increasing your keyword density.
Flash
Excellent! No flash component is detected on this page.

Flash content can not be properly indexed by search engines, and normally flash file is large in size, which slow down the loading of your page.

Tips:
1. avoid flash content whenever possible if you wish to have a fast and SEO friendly website.
Frame
Excellent! No frame is detected on this page.

Framesets and individual frames could cause problem for search engine to crawl your pages

Tips:
1. avoid frames whenever possible.
2. search engines do not like frames.
3. use iframe instead if you really have no choice.
Inline CSS
27 Inline CSS components are detected on this page.

It is a good practice to move inline CSS rules into an external CSS file in order to make your page lighter and increasing the text to code ratio.

Tips:
1. move inline css rules to external css file.
2. separate style from html.
Nested Table
Excellent! No nested table is detected on this page (nested table : 0, total table : 0)

nested tables could slow down page rendering and lead to bad user experience.

Tips:
1. avoiding <table> for your page layout.
2. using <div> instead of <table>.
Plain Text Email
Excellent! No Plain Text Email is detected on this page.

Redirect Count
2 redirections were detected for loading this page.

Using HTTPS
Excellent! HTTPS is used for your page.

WWW Resolve
Excellent! the websites https://www.caltech.edu/ and http://caltech.edu are resolved to the same url :https://www.caltech.edu/

Search Engines treat URLs with or without "www" as two different records.

Tips:
1. edit your .htaccess file and permanently redirect one to the other (eg redirect www.mysite.com to mysite.com).
URL Rewrite
Non SEO Friendly URLs
https://scienceexchange....m_source=caltechedudyk&utm_medium=web&utm_campaign=cseai
https://scienceexchange....rce=caltechedudyk&utm_medium=web&utm_campaign=csequantum
https://scienceexchange....m_source=caltechedudyk&utm_medium=web&utm_campaign=cseai
https://scienceexchange....rce=caltechedudyk&utm_medium=web&utm_campaign=csequantum


You may use url rewrite techniques to make these 4 urls to be SEO friendly.

clean, short and relevant URLs are favoured by users and search engines

Tips:
1. use url rewrite to turn dynamic pages with query parameters into seo friendly static pages.
2. put your important keywords in the url.
3. good urls are not only user friendly but also seo friendly.
Underscore In URL
URLs with underscore
https://scienceexchange....yk&utm_medium=web&utm_campaign=cseai
https://scienceexchange....m_medium=web&utm_campaign=csequantum
https://scienceexchange....yk&utm_medium=web&utm_campaign=cseai
https://scienceexchange....m_medium=web&utm_campaign=csequantum


You have 4 Urls with underscore.

Search Engines treat hyphen as word separator, they do not treat underscore as word separator.


Tips:
1. use hyphen "-" instead of underscore "_" to optimize your page url.
2. help search engines to better understand your url, eventually will benefit your page`s ranking.
Links
Internal Links
(link to pages within this domain)
External Links
(link to pages on other websites)
Total
269 24 293


Too many links (293), it may be considered as spam!

Internal Links (link to pages within this domain) - 269
URL Anchor Text
http://caltech.edu/#contentSkip to main content
https://together.caltech.edu/COVID-19 Information
http://caltech.edu/about/visit/plan-your-visitVisit
https://hr.caltech.edu/careersCareers
https://access.caltech.edu/Access
http://caltech.edu/quick-links-facultyfor Faculty
http://caltech.edu/quick-links-studentsfor Students
http://caltech.edu/quick-links-stafffor Staff
http://caltech.edu/quick-links-alumnifor Alumni
https://directory.caltech.edu/Directory
http://caltech.edu/campus-life-events/caltech-todayCaltech Today
https://www.alumni.caltech.edu/Alumni
https://giving.caltech.edu/GIVE
http://caltech.edu/
http://caltech.edu/aboutAbout
http://caltech.edu/about/at-a-glanceAt a Glance
http://caltech.edu/about...ance/university-and-college-rankingsUniversity and College Ranking...
http://caltech.edu/about/leadership/presidentPresident
http://caltech.edu/about/leadership/provostProvost
http://caltech.edu/about/leadership/board-trusteesBoard of Trustees
http://caltech.edu/about...ademic-and-administrative-leadershipAcademic and Administrative Le...
http://caltech.edu/about...alues/diversity-equity-and-inclusionDiversity, Equity, and Inclusi...
http://caltech.edu/about...s/statement-on-freedom-of-expressionFreedom of Expression
http://caltech.edu/about/values/honor-codeHonor Code
http://caltech.edu/about/legacy/history-milestonesHistory & Milestones
http://caltech.edu/about/legacy/awards-and-honorsAwards & Honors
http://caltech.edu/about/legacy/caltech-archivesCaltech Archives
http://caltech.edu/about/legacy/interactive-history-mapInteractive History Map
http://caltech.edu/about/newsNews
http://caltech.edu/about/publications/caltechThis is Caltech
http://caltech.edu/about/publications/caltech-magazineCaltech Magazine
http://caltech.edu/about/publications/periodic-table-caltechPeriodic Table of Caltech
http://caltech.edu/about/publications/innovation-and-impactInnovation and Impact
http://caltech.edu/about...ications/exploration-and-achievementExploration and Achievement
http://caltech.edu/about/visit/directionsDirections
http://caltech.edu/about/visit/campus-mapsCampus Maps
http://caltech.edu/about/visit/parkingParking
http://caltech.edu/about/visit/toursTours
http://caltech.edu/about/offices-departmentsAdministrative Offices & Depar...
http://caltech.edu/researchResearch
http://caltech.edu/resea...s/biology-and-biological-engineeringBiology and Biological Enginee...
http://caltech.edu/resea...s/chemistry-and-chemical-engineeringChemistry and Chemical Enginee...
http://caltech.edu/resea...ivisions/engineering-applied-scienceEngineering & Applied Science
http://caltech.edu/resea...isions/geological-planetary-sciencesGeological & Planetary Science...
http://caltech.edu/resea...sions/humanities-and-social-sciencesHumanities and Social Sciences
http://caltech.edu/resea...ns/physics-mathematics-and-astronomyPhysics, Mathematics and Astro...
http://caltech.edu/research/jplJet Propulsion Laboratory
http://caltech.edu/research/student-researchStudent Research
http://caltech.edu/research/centers-institutesCenters & Institutes
http://caltech.edu/resea...logy-transfer-corporate-partnershipsTechnology Transfer & Corporat...
http://caltech.edu/research/sponsored-researchSponsored Research
http://caltech.edu/research/research-facilitiesResearch Facilities
http://caltech.edu/research/faculty-listingFaculty Listing
http://caltech.edu/academicsAcademics
http://caltech.edu/academics/undergraduate-studiesUndergraduate Studies
http://caltech.edu/academics/graduate-studiesGraduate Studies
http://caltech.edu/academics/online-educationOnline Education
http://caltech.edu/academics/executive-educationExecutive Education
http://caltech.edu/academics/teaching-learning-outreachTeaching, Learning, & Outreach
http://caltech.edu/academics/resources/registrarRegistrar
http://caltech.edu/academics/resources/catalogCatalog
http://caltech.edu/academics/resources/academic-calendarAcademic Calendar
http://caltech.edu/academics/resources/libraryLibrary
http://caltech.edu/academics/resources/international-officesInternational Offices
http://caltech.edu/academics/resources/career-developmentCareer Development
http://caltech.edu/admissions-aidAdmissions & Aid
http://caltech.edu/admis...s-aid/undergraduate-admissions/applyApply
http://caltech.edu/admis...id/undergraduate-admissions/cost-aidCost & Aid
http://caltech.edu/admis...d/graduate-admissions/apply-graduateApply
http://caltech.edu/admis...-aid/graduate-admissions/funding-aidFunding & Aid
http://caltech.edu/campus-life-eventsCampus Life & Events
http://caltech.edu/campus-life-events/calendarInstitute Calendar
http://caltech.edu/campus-life-events/caltech-todayCaltech Today
http://caltech.edu/campus-life-events/athletics-recreationAthletics & Recreation
http://caltech.edu/campus-life-events/campus-programsPublic Programming / CaltechLi...
http://caltech.edu/campus-life-events/performing-visual-artsPerforming & Visual Arts
http://caltech.edu/campus-life-events/housingHousing
http://caltech.edu/campus-life-events/diningDining
http://caltech.edu/campus-life-events/caltech-yCaltech Y
http://caltech.edu/campus-life-events/wellness-servicesWellness Services
http://caltech.edu/campus-life-events/diversity-centerDiversity Center
http://caltech.edu/campus-life-events/securitySecurity
http://caltech.edu/campus-life-events/emergency-informationEmergency Information
http://caltech.edu/aboutAbout Caltech
http://caltech.edu/researchResearch
http://caltech.edu/academicsAcademics
http://caltech.edu/admissions-aidAdmissions & Aid
http://caltech.edu/campus-life-eventsCampus Life & Events
https://together.caltech.edu/COVID-19 Information
http://caltech.edu/about/visit/plan-your-visitVisit
https://hr.caltech.edu/careersCareers
https://access.caltech.edu/Access
http://caltech.edu/quick-links-facultyfor Faculty
http://caltech.edu/quick-links-studentsfor Students
http://caltech.edu/quick-links-stafffor Staff
http://caltech.edu/quick-links-alumnifor Alumni
https://directory.caltech.edu/Directory
http://caltech.edu/campus-life-events/caltech-todayCaltech Today
https://www.alumni.caltech.edu/Alumni
https://giving.caltech.edu/GIVE
...

External Links (link to pages on other websites) - 24
URL Anchor Text
https://www.jpl.nasa.gov...explores-a-winter-wonderland-on-mars
https://www.jpl.nasa.gov...explores-a-winter-wonderland-on-marsNASA Explores a Winter Wonderl...
https://www.jpl.nasa.gov...explores-a-winter-wonderland-on-marsRead Full Article   >
http://www.keckobservatory.orgW. M. Keck Observatory
https://solarfuelshub.org/Joint Center for Artificial Ph...
http://www.theswartzfoundation.org/research_a.aspSloan-Swartz Center for Theore...
http://www.scsn.org/Southern California Seismic Ne...
http://www.facebook.com/californiainstituteoftechnologyFacebook
http://twitter.com/caltechTwitter
https://www.instagram.com/caltecheduInstagram
http://www.youtube.com/caltechYouTube
https://www.coursera.org/caltechCoursera
https://www.edx.org/school/caltechxedXthe edX logo is comprised o...
https://caltech.us5.list...490ec46ef24d22d04308c6&id=36a33f2adaSubscribe Now
https://twitter.com/QuadFellowship@QuadFellowship
https://twitter.com/i/web/status/1611519861456338946https://t.co/vcum2AS7k8
https://twitter.com/i/web/status/1611477040536113153https://t.co/oudMAVzuJQ
https://twitter.com/i/web/status/1611163119455461377https://t.co/YAhjGC4rSj
https://twitter.com/Caltech@Caltech
https://twitter.com/i/web/status/1611089844364533779https://t.co/M8ZDzqtWRY
https://www.instagram.com/reel/Cm3eOCIhYjj/#happynewyear ...
https://www.instagram.com/p/Cmo60udvNTD/#quantum ...
https://www.instagram.com/p/Cly6EfkPyMJ/
https://www.instagram.com/p/ClRHjUQh-G8/#nativeamericanheritagemonth

reasonable number of links (below 100) per page will give a better user experience.


Tips:
1. keep the number of links per page below 100.
2. having more than 100 links in a single page will lead to a bad user experience, and it possibly runs into the risk of been considered as spam.
3. search engines may not follow all the links if you have too many of them in a single page.
Images
Total Images Alt Present Alt Missing
124 123 1


1 images do not have Alt values.

Image URL - 124
URL ALT Text
https://www.facebook.com/tr?id=216652915781085&ev=PageView&noscript=1
http://caltech.edu/static/theme-v7.0/img/icon-chevron-grey-550.pngDown arrow
http://caltech.edu/static/core/img/caltech-new-logo.pngCaltech Logo
http://caltech.edu/static/theme-v7.0/img/icon-search.pngOpen search form
http://caltech.edu/static/theme-v7.0/img/menu-burger.pngMain Menu
http://caltech.edu/static/theme-v7.0/img/icon-search.pngOpen search form
https://caltech-prod.s3..../images/soil-rhizosphere.2e16d0ba.fill-1060x780-c100.jpgThe first few inches of soil s...
https://caltech-prod.s3....s/SSPD-1440x1060pixels48.2e16d0ba.fill-1060x780-c100.jpgSSPD patch
https://caltech-prod.s3....echMagazine-Year-Roundup.2e16d0ba.fill-1060x780-c100.jpgCollage of equations, robots, ...
http://caltech.edu/static/airspace/img/icon-chevron-left.pngPrevious
http://caltech.edu/static/airspace/img/icon-chevron-right.pngNext
https://caltech-prod.s3....m/main/images/ai-carousel.2e16d0ba.fill-163x144-c100.jpgillustration of machines, cars...
https://caltech-prod.s3....nceExchange-Quantum-1440x.2e16d0ba.fill-163x144-c100.jpgIllustration of a quantum comp...
https://caltech-prod.s3....-Sandoval_Aurora-STAFF-90.fb8a1bc8.fill-163x144-c100.jpgAurora Ruiz-Sandoval
https://caltech-prod.s3....mages/Palomar-Observatory.2e16d0ba.fill-163x144-c100.jpgPalomar Observatory
https://caltech-prod.s3....m/main/images/ai-carousel.2e16d0ba.fill-163x144-c100.jpgillustration of machines, cars...
https://caltech-prod.s3....nceExchange-Quantum-1440x.2e16d0ba.fill-163x144-c100.jpgIllustration of a quantum comp...
https://caltech-prod.s3....-Sandoval_Aurora-STAFF-90.fb8a1bc8.fill-163x144-c100.jpgAurora Ruiz-Sandoval
https://caltech-prod.s3....mages/Palomar-Observatory.2e16d0ba.fill-163x144-c100.jpgPalomar Observatory
http://caltech.edu/static/airspace/img/icon-chevron-left.pngprev
http://caltech.edu/static/airspace/img/icon-chevron-right.pngnext
https://caltech-prod.s3....main/images/Lester_102417_2968.2e16d0ba.fill-300x195.jpgmembers of the Caltech women's...
https://caltech-prod.s3....main/images/Lester_102417_1314.2e16d0ba.fill-300x195.jpgstudents talking
https://caltech-prod.s3....ages/Bechtel_Residence_0GBE78v.2e16d0ba.fill-300x195.jpgBechtel Residence
https://caltech-prod.s3....main/images/Lester_102317_4415.2e16d0ba.fill-300x195.jpgstudent painting
https://caltech-prod.s3....van-SURF_2018-AirAmbulance-234.2e16d0ba.fill-300x195.jpgstudent working on air ambulan...
https://caltech-prod.s3....s/Elliott_David-SURF_2018-1979.2e16d0ba.fill-300x195.jpgstudent working in lab
https://caltech-prod.s3....naws.com/main/images/Lester_102417_2968.max-1400x800.jpgmembers of the Caltech women's...
https://caltech-prod.s3....naws.com/main/images/Lester_102417_1314.max-1400x800.jpgstudents talking
https://caltech-prod.s3....m/main/images/Bechtel_Residence_0GBE78v.max-1400x800.jpgBechtel Residence
https://caltech-prod.s3....naws.com/main/images/Lester_102317_4415.max-1400x800.jpgstudent painting
https://caltech-prod.s3....ges/Yu_Evan-SURF_2018-AirAmbulance-2341.max-1400x800.jpgstudent working on air ambulan...
https://caltech-prod.s3....ain/images/Elliott_David-SURF_2018-1979.max-1400x800.jpgstudent working in lab
https://caltech-prod.s3....naws.com/main/images/Lester_102317_2028.max-1400x800.jpgstudents in dorm room
https://caltech-prod.s3....mages/Annenberg-Moore-Labs_1955_qzo3GCT.max-1400x800.jpgAnnenberg and Moore Labs
https://caltech-prod.s3....m/main/images/LeMar_Lexy-SURF_2018-3813.max-1400x800.jpgstudent working in lab
https://caltech-prod.s3....e_Hall_of_Mathematics_and_Physics_-6791.max-1400x800.jpgaerial view of Millikan Pond
https://caltech-prod.s3..../main/images/ME72-2018_Competition-2419.max-1400x800.jpgengineering competition
https://caltech-prod.s3....naws.com/main/images/Lester_102317_0084.max-1400x800.jpgstudents at table
https://caltech-prod.s3....n/images/Stroder_Madelyn-SoCaltech-4923.max-1400x800.jpgCaltech student working
https://caltech-prod.s3....s.com/main/images/Cahill_3087-Lance2012.max-1400x800.jpgCahill Center for Astronomy an...
https://caltech-prod.s3....com/main/images/Annenberg_102317_2837_1.max-1400x800.jpggroup of students studying
https://caltech-prod.s3....s.com/main/images/Annenberg_102317_3057.max-1400x800.jpgstudents working together
https://caltech-prod.s3..../main/images/17-LindeRobinson-2012_9111.max-1400x800.jpgLinde + Robinson Laboratory fo...
https://caltech-prod.s3....images/14-Fleming_Cannon_Firing_7049a_2.max-1400x800.jpgFleming Cannon
https://caltech-prod.s3....main/images/13-Gates-Thomas_102417_0769.max-1400x800.jpgstudents working together
https://caltech-prod.s3..../images/12-Gates-Thomas-Laboratory_3739.max-1400x800.jpgGates Thomas Laboratory
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https://caltech-prod.s3....E_2022-12-06_10.48.25_-_T.2e16d0ba.fill-710x400-c100.jpgTwo illustrated mice on a colo...
https://caltech-prod.s3.....com/main/images/IMG_2682.4799b22b.fill-710x400-c100.jpgFayth Tan
https://caltech-prod.s3....ages/Lewis_Laura_Photo_13.2e16d0ba.fill-710x400-c100.jpgA portrait of Laura Lewis.
https://caltech-prod.s3....man-Institute_52_Seth_Han.2e16d0ba.fill-534x300-c100.jpgPhoto of Beckman Institute
https://caltech-prod.s3....ain/images/Merkin-Collage.2e16d0ba.fill-534x300-c100.jpgcellular imaging
https://caltech-prod.s3..../Memory_Neurons-1440x1060.2e16d0ba.fill-534x300-c100.jpgmemory neurons
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https://caltech-prod.s3....Nanoscience_7274-CC-NEWS-.2e16d0ba.fill-534x300-c100.jpgResearch Image from the Kavli ...
https://caltech-prod.s3....ntoro_Jellyfish-Research-.0fc3edb7.fill-534x300-c100.jpgMultiple Cassiopea jellyfish o...
https://caltech-prod.s3....ages/CAST-Media_Tour-0072.2e16d0ba.fill-534x300-c100.jpgCenter for Autonomous Systems ...
https://caltech-prod.s3..../KeckObservatory-NEWS-WEB.6d806203.fill-534x300-c100.jpgKeck Observatory
https://caltech-prod.s3...._EinsteinPapers_SPOTLIGHT.62195ed1.fill-534x300-c100.jpgAlbert Einstein
https://caltech-prod.s3....ity-Waves-StillImage-NEWS.b096812e.fill-534x300-c100.jpgillustration of gravitational ...
https://caltech-prod.s3....aon-Flat_Lens-Fig5-NEWS-W.2e16d0ba.fill-534x300-c100.jpgflat lens
https://caltech-prod.s3.....com/main/images/JCAP-lab.2e16d0ba.fill-534x300-c100.jpgresearchers in Joint Center fo...
https://caltech-prod.s3....omar_observatory_at_night.8d96e997.fill-534x300-c100.jpgPalomar Observatory
https://caltech-prod.s3....ory_collage_for_web_YmUJ1.2e16d0ba.fill-534x300-c100.jpghistory collage
https://caltech-prod.s3....re-01-Seismo_lab-NEWS-WEB.7eda2310.fill-534x300-c100.jpgseismograph image on map
https://caltech-prod.s3....images/Methane-LosAngeles.2e16d0ba.fill-534x300-c100.jpgA photo showing the Los Angele...
https://caltech-prod.s3....anian-Gut_Bacterian-Illus.5927cf58.fill-534x300-c100.jpgAn artist's rendering of gut b...
https://caltech-prod.s3....naws.com/main/images/KISS.2e16d0ba.fill-534x300-c100.jpgKeck Institute for Space Studi...
https://caltech-prod.s3....in/images/CSN-Sensor_3218.2e16d0ba.fill-534x300-c100.jpgCommunity Seismic Network (CSN...
https://caltech-prod.s3..../main/images/IPAC-Photo_2.2e16d0ba.fill-534x300-c100.jpginfrared image showing spider ...
https://caltech-prod.s3..../WholeBrainFibers_Overlay.2e16d0ba.fill-534x300-c100.jpgoverlay of whole brain fibers
https://caltech-prod.s3....naws.com/main/images/OVRO.2e16d0ba.fill-534x300-c100.pngOwens Valley Radio Observatory
https://caltech-prod.s3....ages/Hixon-Writing-Canter.2e16d0ba.fill-534x300-c100.jpgHixon Writing Center, Caltech
https://caltech-prod.s3....agilov-ClumpingFiber-A7PS.2e16d0ba.fill-534x300-c100.jpgclumping fibers
https://caltech-prod.s3....N-Initiative-2016-NEWS-WE.dc335c18.fill-534x300-c100.jpgDesign of brain
https://caltech-prod.s3....ges/cso_large_new_UAs94LO.2e16d0ba.fill-534x300-c100.jpgCaltech Submillimeter Observat...
https://caltech-prod.s3....images/Huntington_library.06130850.fill-534x300-c100.jpgHuntington Library
https://caltech-prod.s3.....com/main/images/full-sky.2e16d0ba.fill-534x300-c100.jpgTheoretical Cosmology and Phys...
https://caltech-prod.s3....es/Chajnantor_Observatory.2e16d0ba.fill-534x300-c100.jpgChajnantor Observatory
https://caltech-prod.s3....man_mural_in_Downs-L_Cred.2e16d0ba.fill-534x300-c100.jpgFeynman diagrams on wall
https://caltech-prod.s3....ain/images/3CS_Thar_SFC-1.f255a5e8.fill-534x300-c100.jpgCenter for Catalysis and Chemi...
https://caltech-prod.s3....ll_3087-Lance2012_vgGX0hv.2e16d0ba.fill-534x300-c100.jpgCahill Center for Astronomy an...
https://caltech-prod.s3....com/main/images/Crellin_6.2e16d0ba.fill-534x300-c100.jpgCrellin Laboratory of Chemistr...
https://caltech-prod.s3....om/main/images/IST-Banner.2e16d0ba.fill-534x300-c100.jpginformation science
https://caltech-prod.s3.....com/main/images/PIA15399.2e16d0ba.fill-534x300-c100.jpgclouds
https://caltech-prod.s3....es/Map1-Homepage-NEWS-WEB.697e58a8.fill-534x300-c100.jpgmap: Caltech/MIT Voting Techno...
https://caltech-prod.s3....ws.com/main/images/seismo.2e16d0ba.fill-534x300-c100.jpgseismograph
https://caltech-prod.s3.....com/main/images/BaxterSE.2e16d0ba.fill-534x300-c100.jpgDonald E. Baxter, M.D., Hall o...
https://caltech-prod.s3....RoseQuartzFiber_NanoSIMS1.2e16d0ba.fill-534x300-c100.jpgRose Quartz Fiber
https://caltech-prod.s3....ain/images/FLUME-Lab_5622.2e16d0ba.fill-534x300-c100.jpgFLUME lab
https://caltech-prod.s3....aws.com/main/images/Earth.2e16d0ba.fill-534x300-c100.jpgEarth from space
https://caltech-prod.s3....idimensional_data_viz_cop.2e16d0ba.fill-534x300-c100.jpgmultidimensional data visualiz...
https://caltech-prod.s3....in/images/Annenberg_30561.ab794f76.fill-534x300-c100.jpgAnnenberg Center for Informati...
https://caltech-prod.s3....1-19_SMazmanian-Gut_Micro.2e16d0ba.fill-534x300-c100.jpgArtist depiction of bacteria i...
https://caltech-prod.s3....es/tr10.3d.printing.1x948.2e16d0ba.fill-534x300-c100.jpglight-material interactions in...
https://caltech-prod.s3....ges/Goddard_CNT_spotlight.4be6c0e4.fill-534x300-c100.jpgcutaway of a 2.0 nanometer-dia...
https://caltech-prod.s3....m/main/images/Baxter_3565.2e16d0ba.fill-534x300-c100.jpgBaxter Hall, Caltech
https://caltech-prod.s3....ech_Aerial_Looking_North-.be1c658f.fill-534x300-c100.jpgarial photo of Caltech
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https://caltech-prod.s3....m/main/images/Nayla-Abney.2e16d0ba.fill-432x432-c100.pngNayla Abney
https://caltech-prod.s3....in/images/Fager-Closeup-a.2e16d0ba.fill-432x432-c100.pngDavid Ignacio Fager
https://caltech-prod.s3..../images/Adolphs-closeup-a.2e16d0ba.fill-432x432-c100.pngRalph Adolphs
https://caltech-prod.s3....images/De-Kleer-Closeup-a.2e16d0ba.fill-432x432-c100.pngKatherine de Kleer
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https://caltech-prod.s3....mages/BBE_1_-_535x300pxls.2e16d0ba.fill-533x300-c100.jpgmicroscope
https://caltech-prod.s3....images/CCE_logo_deepgreen.828d4e7e.fill-533x300-c100.pngCaltech Division of Chemistry ...
https://caltech-prod.s3....ages/EAS_1_-_535x300pxls4.2e16d0ba.fill-533x300-c100.jpgcogs
https://caltech-prod.s3....ages/GPS_1_-_535x300pxls5.2e16d0ba.fill-533x300-c100.jpgchisel and seismograph
https://caltech-prod.s3....ages/HSS_1_-_535x300pxls6.2e16d0ba.fill-533x300-c100.jpgbrain
https://caltech-prod.s3....ages/PMA_1_-_535x300pxls2.2e16d0ba.fill-533x300-c100.jpgplanets orbiting
http://caltech.edu/static/www/img/caltech-weekly-logo.pngThe Caltech Weekly
https://scontent-sea1-1....BiZNDZ08o9V0qFiufJM-5o2uai_ebMPVZqqfkcjv_i5w&oe=63BA58D6Instagram post 1
https://scontent-sea1-1....BrDcWLySz6mfD8H4KrNbfE3LVh2WIVD5qXZpjaqPiAjA&oe=63BBC80BInstagram post 2
https://scontent-sea1-1....DRwZq-hj0VvsESTGtwoD3oCcyJxNFIJTn9Oale_xZ2Jw&oe=63BB4395Instagram post 3
https://scontent-sea1-1....DWYxLBf1VbIRZJvU9MRvv8-I1q7FeyuOW9P6G54b79gQ&oe=63BBE36CInstagram post 4
http://caltech.edu/static/theme-v7.0/img/flame.pngCaltech Torch
http://caltech.edu/static/core/img/caltech-new-logo.pngCaltech Logo
http://caltech.edu/static/theme-v7.0/img/icon-footerpin.pngmap marker


search engines cannot `see` images, proper Alt content will help them to better understand and index images.

Tips:
1. always add alt attributes to images. Alt is mandatory for accessibility and for valid XHTML.
2. words used within an image`s Alt attribute should be its text equivalent and convey the same information.
3. use a human-readable caption and descriptive text around the image.
CSS
Style Block In Same Page Links to External Style Files Total
0 3 3


Excellent! all stylesheets are kept in separate files.

Links To External Stylesheet Files - 3
Stylesheet URL rel type
https://cdn.datatables.net/1.12.1/css/dataTables.bootstrap4.min.cssstylesheet
https://cdn.datatables.net/responsive/2.3.0/css/responsive.dataTables.min.cssstylesheet
http://caltech.edu/static/CACHE/css/output.9b029d3ae22b.cssstylesheettext/css

Script
Scripts Block In Same Page Links to External Script Files Total
13 10 23


Too many (10) external scripts files , it will slow down the downlaoding.

Links To External Script Files - 10
Script URL Type
https://www.googletagmanager.com/gtag/js?id=G-7RL83EX4D4
https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js
https://cdnjs.cloudflare...ax/libs/mathjax/2.7.5/MathJax.js?config=TeX-MML-AM_CHTML
https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js
https://cdn.datatables.net/1.12.1/js/jquery.dataTables.min.js
https://cdn.datatables.net/responsive/2.3.0/js/dataTables.responsive.min.js
https://cdn.datatables.net/1.12.1/js/dataTables.bootstrap4.min.js
http://caltech.edu/static/CACHE/js/output.54b9aeca30a0.js
http://caltech.edu/static/CACHE/js/output.b5b92fcfdc1a.js
http://caltech.edu/static/CACHE/js/output.d24956f1e110.js

put scripts together and link them from an external files rather then put them in the same file as the main page.

Tips:
1. reduce the use of in-page scripts, put them in separate files and link them in.
2. reduce the number of external script files, it will help browser to make lesser number of http requests from the server.
3. optimize or compress the script files to have smaller size and faster loading.
Blog Or News Release
Link to Blog / News Release Page
http://caltech.edu/about/newsNews
https://www.jpl.nasa.gov...explores-a-winter-wonderland-on-mars


Excellent! we have found blog linked to your site.

Having a blog is a great way to provide fresh content and retain users, search engines favour it too.


Tips:
1. regularly update your blog and provide fresh and quality content.
2. relevant blogs of your website topics, generate more credits in the eyes of your visitors, as well as search engines.
DMOZ Listing
Yes

Excellent! the website is listed in the DMOZ open directory. DMOZ Open Directory Project

Google Analytics
Analytics Service is not implemented for the site.

Google Page Rank
8 Excellent! the website has a high page rank (8/10).

8
0 - 1 2 - 3 4 - 10
Poor Good Excellent
Links From Root Domains
102
Excellent! You do have a lot of root domains (102) linked to your site caltech.edu.

102
< 20 21 - 50 > 51
Poor Good Excellent


Number of backlinks from some other root domains is an indicator of domain authority, the more backlinks your site has, the higher its domain authority, which leads to a higher chance of better ranking.

Tips:
1. make it easy for others to link to your site, provide the code if possible.
2. links from older domains are more powerful than links from new domains.
3. links from .edu and .gov generally have a higher value.
Social Engagement
Your site has an excellent social media engagement!

  Facebook Likes 1,116
  Facebook Shares 948
  Facebook Comments 702
  Tweets 0
  LinkedIn 20

Social Media Integration
Excellent! your site is well integrated with social media networks.

Facebook Pagehttp://www.facebook.com/californiainstituteoftechnology
Twitter Accounthttp://twitter.com/caltech
Google+ PageNot Found


Trustworthiness
93

Excellent! the website has a good Trustworthiness Score (93/100).

93
0 - 19 20 - 39 40 - 59 60 - 79 80 - 100
Very Poor Poor Unsatisfactory Good Excellent


Users are concerned about the safety of their online transactions. Trustworthiness rating is based on real user ratings and that tells you how much other users trust this site, so do the serch engines. note: this trustworthiness score is provided by WOT (Web of Trust).

Tips:
1. pay attention to the look and design of your site, many people look for visual cues when assessing a site`s credibility
2. make your site easy to use, sites that are easy to navigate are perceived as being more trustworthy.
3. make it easy for user to contact you, users will be more comfortable and feel more secured shall they need to get in touch with you.
Child Safe
93 Excellent! the website has a good Child Safe Score (93/100).

93
0 - 19 20 - 39 40 - 59 60 - 79 80 - 100
Very Poor Poor Unsatisfactory Good Excellent


Safe Browsing
Safe! the site caltech.edu is NOT currently listed as suspicious, most-likely it is clean from malware and phining code [ verify this by Google Safe Browsing ]

Ensure that your site is malware free and does not cause harm to users` computers.

Tips:
1. do not put virus, malicious worms, adwares, trojans, spywares and suspicious phishing code in your server.
2. take suspicious behaviours seriously, have a regular check-up and monitor closely of your server`s log files.
3. if your site is black-listed by Google as suspicious, clean it up before requesting for a review.
Traffic Rank
12,611th most visited website in the world.
8,614th most visited website in China  

your site has an excellent high traffic rank in the world.
Websites On Same Server
Excellent! You do have very few domains (3 - lancenet.com.br, caltech.edu, tebex.io) hosted on the same server as caltech.edu (ip : 104.18.14.60).

Too many domains hosted on the same server is an indicator that you are not really serious about your website, and your site will have a higher chance to be surrounded by bad neighbours.

Tips:
1. the fewer domains hosted on the same server/ip the better.
2. avoid shared hosting whenever possible, especially when there are already hundreds or thousands of sites are hosted on the same server.
3. dedicated ip or resources for your site not only do good to your site visitors but also favoured by search engines.
Server Location
your server (IP : 104.18.14.60) is located at United States  
the most site visitors come from China  

your server is located in different place from where most of your site visitors come from.
HTTP Compression
No

your website server does not support HTTP Compression.

Caching
No

your website server does not support Caching.

Server Signature
Excellent! the website server signature is off.

A secure and safe server is not only good for your site visitors but also good for search engines.

Tips:
1. server software version information can be utilized by malicious visitors to attack your server.
2. by turning off the server signature, you actually have made your server a little bit more secure.
3. for Apache server - edit the apache2.conf or the .htaccess file to turn server signature off.
Domain Age
37 years, 32 days old ( 1st registered on : 1986-01-06 )


[ To check the detailed whois info, Use this Whois Lookup Tool ]

excellent, the domain age is old enough.

Domain Expires
1 year, 174 days from today ( expires on : 2024-07-31 )


[ To check the detailed whois info, Use this Whois Lookup Tool ]

domain is expiring soon.

Domain Info
caltech.edu ( 11 characters )

Domain Registrar : EDUCASE

[ To check the detailed whois info, Use this Whois Lookup Tool ]

Domain Created On Last Modified On Expires On
1986-01-06 2023-01-04 2024-07-31
37 years, 32 days old 0 years, 34 days ago 1 year, 174 days from today
37 years, 32 days old


Domain Name Servers used by caltech.edu
DNS Name IP Address
caltech.edu52.26.125.194


You have a nice choice of domain name, which is of a right length (11 characters).

domain name choice and domain age are crucial for SEO.

Tips:
1. keep the domain name short and relevant to the content, which will be easier to be remembered and related to.
2. older domain tends to be more trustworthy.
3. register a domain for more than 1 year, and search engine will think it is a serious business.

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