Iac.es - SEO Checker

Sign up for free! PDF Export
Overview of the SEO Check
Meta information
75% 
Page quality
44% 
Page structure
100% 
Link structure
43% 
Server
54% 
External factors
100% 
SEO Score
Response time
0.86 s
File size
76.30 kB
Words
470
Media files
26
Number of links
107 internal / 33 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Home | Instituto de Astrofísica de Canarias • IAC
The length of the page title is perfect. (434 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
The meta description is missing.
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
https://iac.es/en
The specified canonical link points to a different page.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Server location: Spain
The following language is defined by HTML: en
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
The domain is no subdomain.
The domain length is good.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The charset encoding (UTF-8) is set correctly.
Doctype
(Nice to have)
The doctype HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
GeneratorDrupal 10 (https://www.drupal.org); Commerce 2
MobileOptimizedwidth
HandheldFriendlytrue
viewportwidth=device-width, initial-scale=1.0
langen
charsetutf-8

Automatically check iac.es including all subpages at once!

Try for free
Guaranteed free of charge during trial period.

Page quality

Content
(Critically important)
There are only 470 words on this page. Good pages should have about 800 words of useful content.
These Typos were found:
  • profesor => professor
The average number of words per sentence of 99 words is high.
23.8% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
The page contains a listing, which indicates a good text layout.
4 paragraphs were found on this page.
No placeholders texts or images were found.
There are no duplicates on the site.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
This page loads 40 JavaScript files. This may affect the load time negatively.
A viewport "width=device-width, initial-scale=1.0" is provided.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 9 tags for this page.
Image SEO
(Somewhat important)
Alt text (alternative text) is correctly used on all found images.
Social Networks
(Nice to have)
This page is optimized perfectly for social networks.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
/themes/custom/iac_venus/logo.svgInstituto de Astrofísica de Canarias • IAC
...ing-ciencia-tecnologia.png?itok=iH8a_JMdHome promoted imageHome promoted image
...MG_0040._1.jpeg?h=592781ef&itok=e0BMbgT0Attendees at the GATO collaboration meetingAttendees at the GATO collaboration meeting
...la_Invierno.jpg?h=1f411656&itok=TqCly4GjArtistic recreation of the ExoLife Finder (ELF) telescopeArtistic recreation of the ExoLife Finder (ELF) telescope
....01.46 (1).jpeg?h=dc9a27ae&itok=pk9juJWqStudents visit the IAC stand at the Miniferia de la Ciencia y la Innovacion 2025 held on La PalmaStudents visit the IAC stand at the Miniferia de la Ciencia y la Innovacion 2025 held on La Palma
....40.11 (1).jpeg?h=b5056fd1&itok=_FSUaSqgAttendees at the open day visit the clean room of the IACTEC building in La Laguna. Attendees at the open day visit the clean room of the IACTEC building in La Laguna.
...artin Ward.jpeg?h=ba07c79e&itok=csWm42tQProfesor Martin WardProfesor Martin Ward
...ews/grupo_0.jpg?h=858441b0&itok=27jeRyygAttendees at the conference ‘From Fake News to Real Clusters: The Controversial Fate of High-z Galaxy Protoclusters’ held at the IACTEC building in La LagunaAttendees at the conference ‘From Fake News to Real Clusters: The Controversial Fate of High-z Galaxy Protoclusters’ held at the IACTEC building in La Laguna
...efault/files/images/banners/bannerSO.jpgBanner logo Severo OchoaWeb Severo Ochoa
...es/images/banners/sede electronica 1.jpgSede ElectrónicaSede Electrónica
...ult/files/images/banners/GTC_eng (1).pngGTC_engGTC_eng
.../files/images/banners/banner_portada.jpgDark and Quiet Skies for Science and SocietyDark and Quiet Skies for Science and Society
..._dinamico_environment_sustainability.jpgLogo Environment and SustainabilityEnvironment and Sustainability
...es/images/banners/iactalks_grande6_0.jpgIAC Talks streamingIAC Talks streaming
...efault/files/images/banners/igualdad.jpgImage for Gender Equality PolicyGender Equality Policy
...default/files/images/banners/biblio2.jpgLibraryLibrary
...ault/files/images/banners/ing_UE_peq.jpglogos FEDER FSElogos FEDER FSE
...lt/files/images/banners/financiacion.jpgBanner External fundingExternal funding
...files/images/banners/amigos del iac2.jpgAnnouncement of the IAC Friends. Patronage and Sponsorship ProgrammeIAC Friends. Patronage and Sponsorship Programme
...es/default/files/images/banners/hr_2.jpgLogo HR Excelence in ResearchLogo HR Excelence in Research
.../default/files/images/banners/blog_0.pngBlogBlog
...ogo-Ministerio-Ciencia.png?itok=U4G1qR6fGobierno de España - Ministerio de CienciaGobierno de España - Ministerio de Ciencia
...anarias_color_negro_80.png?itok=_zd_DVsZGobierno de CanariasGobierno de Canarias
...images/banners/ULL (1).png?itok=P72qVd_pUniversidad de La LagunaUniversidad de La Laguna
...vo_color_1000x256_tran.png?itok=ffC7mTWrCSICCSIC
Video URLWidthHeight
/sites/default/files/videos/iac_web_0.mp4

Page structure

H1 heading
(Critically important)
Instituto de Astrofísica de Canarias • IAC
The H1 heading is perfect.
Headings
(Important)
The heading structure is perfect.

Heading structure

Heading levelContent
H1 Instituto de Astrofísica de Canarias • IAC
H2 User account
H2 Mobile: user account menu
H2 Main navigation
H2 News
H2 Events
H2 Employment
H2 General information
H2 About the IAC
H2 IAC Portal
H2 Other links
H2 PostFooter > Newsletter link
Anchor text is an URL
Some internal links have dynamic parameters. All internal URLs, which are not marked as nofollow, should not contain dynamic parameters.
Some anchor texts are used more than once.
There are 10 links with a trivial anchor text.
The number of internal links is ok.
None of the anchor texts is too long.
There are too many external links (33) on this page.

Found links on this page

LinkAttributesAnchor text
https://iac.es/Anchor Skip to main content
https://iac.es/enIMG-ALT Instituto de Astrofísica de Canarias • IAC
A-TITLE Home
https://iac.es/enText duplicate Instituto de Astrofísica de Canarias • IAC
A-TITLE Home
https://iac.es/en/severoochoaseveroochoa
https://twitter.com/IAC_Astrof...New window External URL anchor text
https://twitter.com/IAC_Astrofisica
https://www.facebook.com/Insti...New window External Subdomain URL anchor text
https://www.facebook.com/InstitutodeAstrofisicadeCanarias
https://www.instagram.com/iac_...New window External Subdomain URL anchor text
https://www.instagram.com/iac_astrofisica/
https://www.linkedin.com/compa...New window External Subdomain URL anchor text
https://www.linkedin.com/company/instituto-de-astrof-sica-de-canarias
https://www.flickr.com/photos/...New window External Subdomain URL anchor text
https://www.flickr.com/photos/institutodeastrofisicadecanarias/
http://www.youtube.com/user/IA...New window External Subdomain URL anchor text
http://www.youtube.com/user/IACvideos
http://vimeo.com/astrofisicaiacNew window External URL anchor text
http://vimeo.com/astrofisicaiac
https://www.dailymotion.com/-IAC-New window External Subdomain URL anchor text
https://www.dailymotion.com/-IAC-
/es/blog/vialacteaNew window Subdomain URL anchor text
https://www.iac.es/es/blog/vialactea
https://iac.es/enen
https://iac.es/eses
https://iac.es/en/user/loginLog in
https://iac.es/en/user/loginText duplicate Log in
https://iac.es/enText duplicate en
https://iac.es/esText duplicate es
https://iac.es/en/about-usAbout us
https://iac.es/en/about-usText duplicate About us
/en/about-us/historyHistory
/en/about-us/organigramOrganigram
/en/about-us/scientific-adviso...Scientific Advisory Committee
A-TITLE Scientific Advisory Committee
/en/about-us/list-of-personnelList of personnel
/en/about-us/employmentEmployment
/en/about-us/cooperation-agree...Cooperation agreements
/en/about-us/annual-reportsAnnual reports
/en/observatorios-de-canariasObservatorios de Canarias
/en/observatorios-de-canariasText duplicate Observatorios de Canarias
/en/observatorios-de-canarias/...Teide Observatory
/en/observatorios-de-canarias/...Roque de los Muchachos Observatory
/en/observatorios-de-canarias/...Sky quality
/en/observatorios-de-canarias/...Sky protection
/en/observatorios-de-canarias/...Observing Time
/en/observatorios-de-canarias/...International Scientific Committee (CCI)
/en/science-and-technologyScience and Technology
/en/science-and-technologyText duplicate Science and Technology
/en/science-and-technology/ast...Astrophysical research
/en/science-and-technology/ast...Astrophysical instrumentation
/en/science-and-technology/con...Conferences and talks
/en/science-and-technology/pub...Publications
/en/science-and-technology/tec...Technology Transfer: IACTEC
/en/science-and-technology/tec...Technology
/en/science-and-technology/ear...IAC Early-career visitor programme
/en/postgraduate-trainingPostgraduate Training
/en/postgraduate-trainingText duplicate Postgraduate Training
/en/postgraduate-training/mast...Master's degree
/en/postgraduate-training/doct...Doctorate
/en/postgraduate-training/grantsGrants
/en/postgraduate-training/inte...Internships
A-TITLE Postgraduate and training: Internships
/en/postgraduate-training/summ...Summer and Winter Schools
/en/postgraduate-training/astr...Astrophysics Department
https://iac.es/en/outreachCommunication and Outreach
https://iac.es/en/outreachText duplicate Communication and Outreach
https://iac.es/en/outreach/newsNews
/en/outreach/projects-and-acti...Projects and activities
/en/outreach/multimedia-galleryMultimedia gallery
/en/outreach/iac-publishingIAC publishing
/en/outreach/educational-resou...Educational resources
https://iac.es/en/outreach/visitsVisits
/en/outreach/attention-to-the-...Attention to the media
https://twitter.com/IAC_Astrof...New window External Text duplicate URL anchor text
https://twitter.com/IAC_Astrofisica
https://www.facebook.com/Insti...New window External Subdomain Text duplicate URL anchor text
https://www.facebook.com/InstitutodeAstrofisicadeCanarias
https://www.instagram.com/iac_...New window External Subdomain Text duplicate URL anchor text
https://www.instagram.com/iac_astrofisica/
https://www.linkedin.com/compa...New window External Subdomain Text duplicate URL anchor text
https://www.linkedin.com/company/instituto-de-astrof-sica-de-canarias
https://www.flickr.com/photos/...New window External Subdomain Text duplicate URL anchor text
https://www.flickr.com/photos/institutodeastrofisicadecanarias/
http://www.youtube.com/user/IA...New window External Subdomain Text duplicate URL anchor text
http://www.youtube.com/user/IACvideos
http://vimeo.com/astrofisicaiacNew window External Text duplicate URL anchor text
http://vimeo.com/astrofisicaiac
https://www.dailymotion.com/-IAC-New window External Subdomain Text duplicate URL anchor text
https://www.dailymotion.com/-IAC-
/es/blog/vialacteaNew window Subdomain Text duplicate URL anchor text
https://www.iac.es/es/blog/vialactea
/en/outreach/news/gatos-intern...Trivial anchor text
Read more
A-TITLE GATOS international collaboration meets at the IAC to unravel the mysteries of active galactic nuclei
/en/outreach/news/iac-opens-ca...Text duplicate Trivial anchor text
Read more
A-TITLE The IAC opens the call for its Winter School focused on key optical technologies for Astronomy
/en/outreach/news/iac-turns-st...Text duplicate Trivial anchor text
Read more
A-TITLE The IAC turns students from La Palma into ‘astro-detectives’ during the Mini Science Fairs
/en/outreach/news/iac-joins-op...Text duplicate Trivial anchor text
Read more
A-TITLE The IAC joins Open Government Week with open days at its headquarters and at IACTEC
/en/outreach/news/martin-ward-...Text duplicate Trivial anchor text
Read more
A-TITLE Martin Ward present the highlights of the James Webb Telescope and the search for life beyond Earth at the Museum of Science in Tenerife
/en/outreach/news/internationa...Text duplicate Trivial anchor text
Read more
A-TITLE International conference at the IAC explores the mysteries of the early universe
https://iac.es/en/outreach/newsSee all news
/en/tipo-de-congreso/conferenceConference
/en/science-and-technology/con...Text duplicate Trivial anchor text
Read more
A-TITLE GaiaAlerts2025: The 16th Gaia Science Alerts and ACME Time-Domain Workshop
/en/tipo-de-congreso/conferenceText duplicate Conference
/en/science-and-technology/con...Text duplicate Trivial anchor text
Read more
A-TITLE 1st UNDARK Workshop: Astrophysical Probes of Dark Sectors with Radiowave Observations
https://iac.es/en/eventsSee all events
/en/job-contractual-modality/i...Indefinite contract
/en/employment/ingenieroa-seni...Text duplicate Trivial anchor text
Read more
A-TITLE Ingeniero/a Sénior_LAOS_CELESTE PS-2025-042
/en/job-contractual-modality/i...Text duplicate Indefinite contract
/en/employment/2-tecnicosas-ta...Text duplicate Trivial anchor text
Read more
A-TITLE 2_Técnicos/as Taller_LAOS PS-2025-041
https://iac.es/en/employment/en/employment
https://iac.es/en/severoochoaNew window Nofollow /en/severoochoa
https://iac.sede.gob.es/New window Nofollow External Subdomain URL anchor text
https://iac.sede.gob.es
/en/infrastructures-eventsNew window Nofollow Subdomain URL anchor text
https://www.iac.es/en/infrastructures-events
/en/science-and-technology/con...New window Nofollow Subdomain URL anchor text
https://www.iac.es/en/science-and-technology/conferences-and-talks/conferences/...
/en/environment-and-sustainabi...New window Nofollow Subdomain URL anchor text
https://www.iac.es/en/environment-and-sustainability
https://iactalks.iac.es/New window Nofollow External Subdomain URL anchor text
https://iactalks.iac.es
/en/gender-equality-policyNew window Nofollow Subdomain URL anchor text
https://www.iac.es/en/gender-equality-policy
https://www.iac.es/en/libraryNew window Nofollow Subdomain URL anchor text
https://www.iac.es/en/library
https://www.dgfc.sepg.hacienda...New window Nofollow External Subdomain URL anchor text
https://www.dgfc.sepg.hacienda.gob.es/sitios/dgfc/en-gb/Paginas/Inicio.aspx
/en/external-fundingNew window Nofollow Subdomain URL anchor text
https://www.iac.es/en/external-funding
https://www.iac.es/en/iac-friendsNew window Nofollow Subdomain URL anchor text
https://www.iac.es/en/iac-friends
https://euraxess.ec.europa.eu/...New window Nofollow External Subdomain URL anchor text
https://euraxess.ec.europa.eu/jobs/hrs4r
/es/blog/vialacteaNew window Nofollow Subdomain Text duplicate URL anchor text
https://www.iac.es/es/blog/vialactea
https://www.ciencia.gob.es/New window Nofollow External Subdomain URL anchor text
https://www.ciencia.gob.es
http://www.gobiernodecanarias....New window Nofollow External Subdomain URL anchor text
http://www.gobiernodecanarias.org
https://www.ull.es/New window Nofollow External Subdomain URL anchor text
https://www.ull.es
http://www.csic.es/New window Nofollow External Subdomain URL anchor text
http://www.csic.es
https://iac.es/en/contactContact
/en/how-to-get-to-the-iacHow to get to the IAC
/en/list-of-personnelText duplicate List of personnel
https://iac.es/en/libraryLibrary
/en/general-registerGeneral register
https://iac.es/en/legislationLegislation
https://iac.es/en/transparencyTransparency
/en/code-of-ethics-anti-fraud-...Code of ethics and anti-fraud policy
/en/gender-equality-policyGender Equality Policy
/en/environment-and-sustainabi...Environment and Sustainability
https://iac.es/en/iac-projectsIAC Projects
/en/external-fundingExternal funding
https://iac.es/en/severoochoaSevero Ochoa Programme
https://iac.es/en/iac-friendsIAC Friends
https://iac.es/en/sitemapSitemap
/en/privacy-policiesPrivacy policy
https://iac.es/en/legal-noticeLegal notice
https://iac.es/en/cookies-policyCookies policy
https://iac.es/en/accessibilityAccessibility
https://iac.es/en/employmentText duplicate Employment
https://iac.es/en/tendersTenders
/en/institutional-brandingInstitutional branding
/en/rss?page_manager_page_vari...RSS
https://iac.sede.gob.es/External Subdomain Electronic services site
A-TITLE Electronic services site
https://iac.es/en/ethics-channelEthics channel
https://iac.es/en/newsletterJoin our Newsletter
https://twitter.com/IAC_Astrof...New window External Text duplicate URL anchor text
https://twitter.com/IAC_Astrofisica
https://www.facebook.com/Insti...New window External Subdomain Text duplicate URL anchor text
https://www.facebook.com/InstitutodeAstrofisicadeCanarias
https://www.instagram.com/iac_...New window External Subdomain Text duplicate URL anchor text
https://www.instagram.com/iac_astrofisica/
https://www.linkedin.com/compa...New window External Subdomain Text duplicate URL anchor text
https://www.linkedin.com/company/instituto-de-astrof-sica-de-canarias
https://www.flickr.com/photos/...New window External Subdomain Text duplicate URL anchor text
https://www.flickr.com/photos/institutodeastrofisicadecanarias/
http://www.youtube.com/user/IA...New window External Subdomain Text duplicate URL anchor text
http://www.youtube.com/user/IACvideos
http://vimeo.com/astrofisicaiacNew window External Text duplicate URL anchor text
http://vimeo.com/astrofisicaiac
https://www.dailymotion.com/-IAC-New window External Subdomain Text duplicate URL anchor text
https://www.dailymotion.com/-IAC-
/es/blog/vialacteaNew window Subdomain Text duplicate URL anchor text
https://www.iac.es/es/blog/vialactea

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://iac.es/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
The web server transmits the web page (HTML) in compressed form.
Performance
(Somewhat important)
The page response time of 0.86 seconds is longer than the recommended limit of 0.4 seconds. A high response time unnecessarily slows down search engine crawling and results in bad user experience as well.
This page loads 48 CSS files. This may affect the page load time negatively.
This page loads 40 JavaScript files. This may affect the load time negatively.
The file size of the HTML document is fine (76 kB).

HTTP Response Header

NameValue
dateSat, 24 May 2025 16:23:38 GMT
serverApache
cache-controlmust-revalidate, no-cache, private
x-drupal-dynamic-cacheUNCACHEABLE (response policy)
content-languageen
x-content-type-optionsnosniff
x-frame-optionsSAMEORIGIN
expiresSun, 19 Nov 1978 05:00:00 GMT
x-generatorDrupal 10 (https://www.drupal.org)
x-commerce-core2
x-drupal-cacheUNCACHEABLE (response policy)
access-control-allow-origin*
access-control-expose-headers*
varyAccept-Encoding
content-encodinggzip
content-length12262
content-typetext/html; charset=UTF-8
statuscode200
http_versionHTTP/1.1

External factors

This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 139 referring domains.
This page has 224 backlinks.
This page has backlinks from 116 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

#
# robots.txt
#
# This file is to prevent the crawling and indexing of certain parts
# of your site by web crawlers and spiders run by sites like Yahoo!
# and Google. By telling these "robots" where not to go on your site,
# you save bandwidth and server resources.
#
# This file will be ignored unless it is at the root of your host:
# Used:    http://example.com/robots.txt
# Ignored: http://example.com/site/robots.txt
#
# For more information about the robots.txt standard, see:
# http://www.robotstxt.org/robotstxt.html

User-agent: *
# CSS, JS, Images
Allow: /core/*.css$
Allow: /core/*.css?
Allow: /core/*.js$
Allow: /core/*.js?
Allow: /core/*.gif
Allow: /core/*.jpg
Allow: /core/*.jpeg
Allow: /core/*.png
Allow: /core/*.svg
Allow: /profiles/*.css$
Allow: /profiles/*.css?
Allow: /profiles/*.js$
Allow: /profiles/*.js?
Allow: /profiles/*.gif
Allow: /profiles/*.jpg
Allow: /profiles/*.jpeg
Allow: /profiles/*.png
Allow: /profiles/*.svg
# Directories
Disallow: /core/
Disallow: /profiles/
# Files
Disallow: /README.md
Disallow: /composer/Metapackage/README.txt
Disallow: /composer/Plugin/ProjectMessage/README.md
Disallow: /composer/Plugin/Scaffold/README.md
Disallow: /composer/Plugin/VendorHardening/README.txt
Disallow: /composer/Template/README.txt
Disallow: /modules/README.txt
Disallow: /sites/README.txt
Disallow: /themes/README.txt
Disallow: /web.config
# Paths (clean URLs)
Disallow: /admin/
Disallow: /comment/reply/
Disallow: /filter/tips
Disallow: /node/add/
Disallow: /search/
Disallow: /user/register
Disallow: /user/password
Disallow: /user/login
Disallow: /user/logout
Disallow: /media/oembed
Disallow: /*/media/oembed
# Paths (no clean URLs)
Disallow: /index.php/admin/
Disallow: /index.php/comment/reply/
Disallow: /index.php/filter/tips
Disallow: /index.php/node/add/
Disallow: /index.php/search/
Disallow: /index.php/user/password
Disallow: /index.php/user/register
Disallow: /index.php/user/login
Disallow: /index.php/user/logout
Disallow: /index.php/media/oembed
Disallow: /index.php/*/media/oembed

Similar sites

Search preview

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
IAC82%Check
Canarias IAC75%Check
de Canarias IAC72%Check
Astrofísica de Canarias IAC69%Check
de Canarias68%Check
Canarias66%Check
Instituto de Astrofísica65%Check
Instituto63%Check
Astrofísica63%Check
News48%Check
Show more keywords and terms

Automatically check iac.es including all subpages at once!

Try for free
Guaranteed free of charge during trial period.

Cookie Policy

We use cookies to make our site work and also for analytics and advertising purposes. You can enable or disable optional cookies as desired. See the following links for more information.

Contact | Privacy

We need these so the site can function properly

So we can better understand how visitors use our website

So we can serve you tailored ads and promotions