Softwareheritage.org - SEO Checker

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Overview of the SEO Check
Meta information
77% 
Page quality
70% 
Page structure
58% 
Link structure
0% 
Server
78% 
External factors
100% 
SEO Score
Response time
1.07 s
File size
142.30 kB
Words
1707
Media files
42
Number of links
172 internal / 45 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Home Page - Software Heritage
The length of the page title is perfect. (288 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://www.softwareheritage.org/
There is a valid canonical link specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en-us
Server location: United States of America
The following language is defined by HTML: en-us
Alternate/Hreflang Links
(Somewhat important)
The alternate link to the page itself is missing.
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
viewportwidth=device-width,initial-scale=1,maximum-scale=1,user-scalable=no
robotsindex, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1
generatorGive v3.19.4
msapplication-TileImagehttps://www.softwareheritage.org/wp-content/uploads/2015/08/cropped-swh-logo-270x270.png
article:modified_time2024-10-18T08:20:17+00:00
langen-us
twitter:cardsummary_large_image
og:localeen_US
og:typewebsite
og:titleHome Page
og:urlhttps://www.softwareheritage.org/
og:site_nameSoftware Heritage
charsetUTF-8

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Page quality

Content
(Critically important)
Some words from the page title are not used within the pages content
This page contains 1707 words. That's ok.
37.2% of the text are stop words.
The page contains a listing, which indicates a good text layout.
38 paragraphs were found on this page.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 23.94 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
A viewport "width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no" is provided.
At least one Apple touch icon is specified.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 34 tags for this page.
Image SEO
(Somewhat important)
41 images have no alt attribute. The content of alt attributes is used by search engines.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
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
...epress-multilingual-cms/res/flags/en.pngNo alt attribute provided
...epress-multilingual-cms/res/flags/fr.pngNo alt attribute provided
...epress-multilingual-cms/res/flags/es.pngNo alt attribute provided
/wp-content/uploads/2015/08/swh-logo.pngSoftware Heritage
...epress-multilingual-cms/res/flags/en.pngNo alt attribute provided
...epress-multilingual-cms/res/flags/fr.pngNo alt attribute provided
...epress-multilingual-cms/res/flags/es.pngNo alt attribute provided
...oads/2016/06/10-SWH_site-carrousel-2.pngNo alt attribute provided
...ploads/2015/10/SWH_site-carrousel-A2.jpgNo alt attribute provided
...nt/uploads/2016/06/wood-knot_bw_left.jpgNo alt attribute provided
...oads/2016/06/10-SWH_site-carrousel-2.pngNo alt attribute provided
...uploads/2015/10/SWH-logo_anim-texte1.gifNo alt attribute provided
...ads/2021/05/browser_icon_swh_grey-2.jpegNo alt attribute provided
...ploads/2021/05/save_diskette_grey-3.jpegNo alt attribute provided
...ploads/2021/05/save_code_now_grey-2.jpegNo alt attribute provided
...ent/uploads/2019/09/collect-curate-1.pngNo alt attribute provided
...uploads/2015/10/action-library__red1.pngNo alt attribute provided
...ploads/2015/10/action-research__red1.pngNo alt attribute provided
...ploads/2015/10/action-industry__red1.pngNo alt attribute provided
...t/uploads/2017/12/inria_testimonial.jpegNo alt attribute provided
/wp-content/uploads/2021/11/cea-edited.pngNo alt attribute provided
...s/2017/11/Microsoft-Platinuim_dev2-1.pngNo alt attribute provided
/wp-content/uploads/2020/11/CNRS_edited.pngNo alt attribute provided
/wp-content/uploads/2020/02/huawei.pngNo alt attribute provided
...nement-superieur-et-recherche-edited.pngNo alt attribute provided
/wp-content/uploads/2018/06/google.pngNo alt attribute provided
/wp-content/uploads/2020/02/oin.pngNo alt attribute provided
...uploads/2020/02/Université-de-Paris.pngNo alt attribute provided
...ontent/uploads/2021/09/Logo_AdaCore.jpegNo alt attribute provided
...ontent/uploads/2024/05/crkn-edited-2.pngNo alt attribute provided
...nt/uploads/2023/02/MINARM_DGA_edited.pngNo alt attribute provided
...content/uploads/2016/04/dinum-edited.pngNo alt attribute provided
/wp-content/uploads/2017/11/github-1.pngNo alt attribute provided
.../uploads/2020/09/Sorbonne-Universite.pngNo alt attribute provided
...ent/uploads/2019/06/universitadipisa.pngNo alt attribute provided
...ntent/uploads/2024/11/cnes-sponsor-1.jpgNo alt attribute provided
/wp-content/uploads/2024/07/CSAL-1.pngNo alt attribute provided
...a-School-of-Advanced-Studies-sponsor.pngNo alt attribute provided
...ent/uploads/2023/03/scannos_edited-1.pngNo alt attribute provided
...ads/2023/01/scuela_normale_superiore.pngNo alt attribute provided
...t/uploads/2024/02/universite-loraine.pngNo alt attribute provided
.../2021/10/UNESCO_logo_hor_blue-300x64.pngNo alt attribute provided

Page structure

H1 heading
(Critically important)
There is no H1 heading specified.
Headings
(Important)
Some headings occur twice on the page.
The structure of headings is missing one or more levels. Do not skip heading levels.
There are 58 headings on the page. The amount of headings should be in a more proper relation to the amount of text.

Heading structure

Heading levelContent
H3 Software Heritage
H3 Software [is our] Heritage
H3 Software is fragile
H3 Software is the key
H3 Software Heritage Duplicate text
H3 We are building the universal software archive
H3 We are building the universal software archive Duplicate text
H3 Use the Archive
H3 Use the Archive Duplicate text
H3 Do we already have your code?
H3 Do we already have your code? Duplicate text
H3 API
H3 API Duplicate text
H3 It concerns all of us. And you can help!
H3 It concerns all of us. And you can help! Duplicate text
H3 Initiator
H3 Inria
H3 Diamond Sponsors
H3 CEA
H3 Microsoft
H3 Platinum sponsors
H3 CNRS
H3 Huawei
H3 MESRI
H3 Gold Sponsors
H3 Google
H3 Open Invention Network
H3 Université de Paris
H3 Silver Sponsors
H3 AdaCore
H3 CRKN consortium
H3 Directorate General of Armaments – DGA
H3 French Government (DINUM)
H3 GitHub
H3 Sorbonne Université
H3 Università di Pisa
H3 Bronze Sponsors
H3 Centre National d’Etudes Spatiales (CNES)
H3 CSAL – Consortium of Swiss Academic Libraries
H3 Sant’Anna School of Advanced Studies
H3 SCANOSS
H3 Scuola Normale Superiore
H3 Université de Lorraine
H3 Follow us
H5 Browse
H5 Save Code Now
H5 Archive Research Software
H5 Rescue Legacy Code
H5 Source files
H5 Commits
H5 Projects
H5 Heritage
H5 Heritage Duplicate text
H5 Science
H5 Science Duplicate text
H5 Industry
H5 Industry Duplicate text
H5 Join our newsletter
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.
9 links don't have an anchor text.
There are 22 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 (45) on this page.

Found links on this page

LinkAttributesAnchor text
/mission/Subdomain Mission
/mission/heritage/Subdomain Heritage
/mission/science/Subdomain Science
/mission/industry/Subdomain Industry
/mission/approach/Subdomain Approach
/features/Subdomain Features
https://archive.softwareherita...New window External Subdomain Browse
https://save.softwareheritage....New window External Subdomain Save Code Now
/save-reference-research-softw...Subdomain Save Research Software
/save-reference-research-softw...Subdomain Benefits
/how-to-archive-reference-code/Subdomain Guidelines (HOWTO)
/swhap/Subdomain SWH Acquisition Process
https://stories.softwareherita...New window External Subdomain Software Stories
/browser-extensions/Subdomain Browser extensions
/mirrornetwork/Subdomain Mirror Network
/community/Community
/community/users/Subdomain Users
/ambassadors/Subdomain Ambassadors
/community/developers/Subdomain Developers
/community/scientists/Subdomain Scientists
/community/students/Subdomain Students
/grants/Subdomain Grants
/supportSubdomain Support us
/support/sponsors/Subdomain Sponsors
/support/members-alig/Subdomain ALIG members
/support/partners/Subdomain Partners
/mirrors/Subdomain Mirrors
/support/testimonials/Subdomain Testimonials
/donate/Subdomain Donate
/faq/Subdomain FAQ
/people/Subdomain Team
/jobs/Subdomain Work with us
/communication-kit/Subdomain Communication kit
/news/Subdomain News
/blog/Subdomain Blog
/news/events/Subdomain Events
/newsletter/Subdomain Newsletter
/publications/Subdomain Publications
/category/annualreport/Subdomain Annual Reports
/donate/Subdomain Text duplicate Donate
/?lang=enSubdomain English
A-TITLE English
/?lang=frSubdomain Français
A-TITLE Français
/?lang=esSubdomain Español
A-TITLE Español
https://www.softwareheritage.org/Subdomain Home
https://gitlab.softwareheritag...External Subdomain Development
https://docs.softwareheritage....External Subdomain Documentation
https://status.softwareheritag...New window External Subdomain Operational
/auth/Subdomain Login
https://www.softwareheritage.org/Subdomain IMG-ALT Software Heritage
https://www.softwareheritage.org/Subdomain Text duplicate Software Heritage
/mission/Subdomain Text duplicate Mission
/mission/heritage/Subdomain Text duplicate Heritage
/mission/science/Subdomain Text duplicate Science
/mission/industry/Subdomain Text duplicate Industry
/mission/approach/Subdomain Text duplicate Approach
/features/Subdomain Text duplicate Features
https://archive.softwareherita...New window External Subdomain Text duplicate Browse
https://save.softwareheritage....New window External Subdomain Text duplicate Save Code Now
/save-reference-research-softw...Subdomain Text duplicate Save Research Software
/save-reference-research-softw...Subdomain Text duplicate Benefits
/how-to-archive-reference-code/Subdomain Text duplicate Guidelines (HOWTO)
/swhap/Subdomain Text duplicate SWH Acquisition Process
https://stories.softwareherita...New window External Subdomain Text duplicate Software Stories
/browser-extensions/Subdomain Text duplicate Browser extensions
/mirrornetwork/Subdomain Text duplicate Mirror Network
/community/Text duplicate Community
/community/users/Subdomain Text duplicate Users
/ambassadors/Subdomain Text duplicate Ambassadors
/community/developers/Subdomain Text duplicate Developers
/community/scientists/Subdomain Text duplicate Scientists
/community/students/Subdomain Text duplicate Students
/grants/Subdomain Text duplicate Grants
/supportSubdomain Text duplicate Support us
/support/sponsors/Subdomain Text duplicate Sponsors
/support/members-alig/Subdomain Text duplicate ALIG members
/support/partners/Subdomain Text duplicate Partners
/mirrors/Subdomain Text duplicate Mirrors
/support/testimonials/Subdomain Text duplicate Testimonials
/donate/Subdomain Text duplicate Donate
/faq/Subdomain Text duplicate FAQ
/people/Subdomain Text duplicate Team
/jobs/Subdomain Text duplicate Work with us
/communication-kit/Subdomain Text duplicate Communication kit
/news/Subdomain Text duplicate News
/blog/Subdomain Text duplicate Blog
/news/events/Subdomain Text duplicate Events
/newsletter/Subdomain Text duplicate Newsletter
/publications/Subdomain Text duplicate Publications
/category/annualreport/Subdomain Text duplicate Annual Reports
/donate/Subdomain Text duplicate Donate
/?lang=enSubdomain Text duplicate English
A-TITLE English
/?lang=frSubdomain Text duplicate Français
A-TITLE Français
/?lang=esSubdomain Text duplicate Español
A-TITLE Español
/mission/software-is-fragile/Subdomain Software is fragile unlike words carved in stone it can be deleted or get corrupted
/mission/software-is-the-key/Subdomain Software is the key to access information and a fundamental part of human heritage
/mission/heritage/Subdomain Software Heritage preserves software source code for present and future generations
https://archive.softwareherita...New window External Subdomain No Text
https://archive.softwareherita...New window External Subdomain Browse the archive
/mission/Subdomain Discover our mission
https://archive.softwareherita...New window External Subdomain No Text
https://archive.softwareherita...New window External Subdomain Text duplicate Browse
https://archive.softwareherita...New window External Subdomain Text duplicate Browse the archive
https://save.softwareheritage....New window External Subdomain No Text
https://save.softwareheritage....New window External Subdomain Text duplicate Save Code Now
https://save.softwareheritage....New window External Subdomain Text duplicate Save Code Now
/save-and-reference-research-s...Subdomain No Text
/save-and-reference-research-s...New window Subdomain Archive Research Software
/save-and-reference-research-s...Subdomain Save research software
/swhap/Subdomain No Text
/swhap/New window Subdomain Rescue Legacy Code
/swhap/Subdomain Rescue legacy code
/archiveSubdomain our archive
https://en.wikipedia.org/wiki/...New window External Subdomain SHA1
https://archive.softwareherita...New window External Subdomain Software Heritage API
https://archive.softwareherita...New window External Subdomain Read the API documentation
/mission/Subdomain mission
https://archive.softwareherita...External Subdomain archive
/mission/heritage/Subdomain cultural institutions
/mission/science/Subdomain scientists
/mission/industry/Subdomain industries
/mission/heritage/Subdomain No Text
/mission/heritage/Subdomain Text duplicate Heritage
/mission/heritage/Subdomain Learn more and help
/mission/science/Subdomain No Text
/mission/science/Subdomain Text duplicate Science
/mission/science/Subdomain Text duplicate Learn more and help
/mission/industry/Subdomain No Text
/mission/industry/Subdomain Text duplicate Industry
/mission/industry/Subdomain Text duplicate Learn more and help
/2017/12/14/inria/Subdomain No Text
/2017/12/14/inria/Subdomain Inria
/2017/12/14/inria/Subdomain Trivial anchor text
Read More
https://www.cea.fr/englishNew window External Subdomain No Text
/2021/11/26/cea/Subdomain CEA
/2021/11/26/cea/Subdomain Text duplicate Trivial anchor text
Read More
https://www.microsoft.com/en-us/New window External Subdomain No Text
/2017/11/06/microsoft-2/Subdomain Microsoft
/2017/11/06/microsoft-2/Subdomain Text duplicate Trivial anchor text
Read More
https://www.cnrs.fr/enNew window External Subdomain No Text
/2020/11/18/cnrs/Subdomain CNRS
/2020/11/18/cnrs/Subdomain Text duplicate Trivial anchor text
Read More
https://www.huawei.com/New window External Subdomain No Text
/2020/02/12/huawei-5/Subdomain Huawei
/2020/02/12/huawei-5/Subdomain Text duplicate Trivial anchor text
Read More
https://www.enseignementsup-re...New window External Subdomain No Text
/2019/09/05/mesri/Subdomain MESRI
/2019/09/05/mesri/Subdomain Text duplicate Trivial anchor text
Read More
https://about.google/New window External No Text
/2018/06/02/google/Subdomain Google
/2018/06/02/google/Subdomain Text duplicate Trivial anchor text
Read More
https://www.openinventionnetwo...New window External Subdomain No Text
/2020/02/04/open-invention-net...Subdomain Open Invention Network
/2020/02/04/open-invention-net...Subdomain Text duplicate Trivial anchor text
Read More
https://u-paris.fr/en/New window External No Text
/2020/02/03/universite-de-paris/Subdomain Université de Paris
/2020/02/03/universite-de-paris/Subdomain Text duplicate Trivial anchor text
Read More
https://www.adacore.com/New window External Subdomain No Text
/2021/09/07/adacore-2/Subdomain AdaCore
/2021/09/07/adacore-2/Subdomain Text duplicate Trivial anchor text
Read More
https://www.crkn-rcdr.ca/enNew window External Subdomain No Text
/2024/05/30/crkn/Subdomain CRKN consortium
/2024/05/30/crkn/Subdomain Text duplicate Trivial anchor text
Read More
https://www.defense.gouv.fr/dga/New window External Subdomain No Text
/2023/02/03/direction-generale...Subdomain Directorate General of Armaments – DGA
/2023/02/03/direction-generale...Subdomain Text duplicate Trivial anchor text
Read More
https://www.numerique.gouv.fr/...New window External Subdomain No Text
/2016/04/13/dinsic/Subdomain French Government (DINUM)
/2016/04/13/dinsic/Subdomain Text duplicate Trivial anchor text
Read More
https://github.com/aboutNew window External No Text
/2019/11/22/github-2/Subdomain GitHub
/2019/11/22/github-2/Subdomain Text duplicate Trivial anchor text
Read More
https://www.sorbonne-universit...New window External Subdomain No Text
/2020/10/01/sorbonne-universite/Subdomain Sorbonne Université
/2020/10/01/sorbonne-universite/Subdomain Text duplicate Trivial anchor text
Read More
https://www.unipi.it/index.php...New window External Subdomain No Text
/2019/06/27/universita-di-pisa/Subdomain Università di Pisa
/2019/06/27/universita-di-pisa/Subdomain Text duplicate Trivial anchor text
Read More
/2024/11/06/centre-national-de...Subdomain No Text
/2024/11/06/centre-national-de...Subdomain Centre National d’Etudes Spatiales (CNES)
/2024/11/06/centre-national-de...Subdomain Text duplicate Trivial anchor text
Read More
https://consortium.ch/?lang=enNew window External No Text
/2024/07/04/csal/Subdomain CSAL – Consortium of Swiss Academic Libraries
/2024/07/04/csal/Subdomain Text duplicate Trivial anchor text
Read More
/2024/11/05/42804/Subdomain No Text
/2024/11/05/42804/Subdomain Sant’Anna School of Advanced Studies
/2024/11/05/42804/Subdomain Text duplicate Trivial anchor text
Read More
https://scanoss.com/New window External No Text
/2023/03/23/scanoss/Subdomain SCANOSS
/2023/03/23/scanoss/Subdomain Text duplicate Trivial anchor text
Read More
https://www.sns.it/enNew window External Subdomain No Text
/2023/01/09/scuola-normale-sup...Subdomain Scuola Normale Superiore
/2023/01/09/scuola-normale-sup...Subdomain Text duplicate Trivial anchor text
Read More
https://www.univ-lorraine.fr/e...New window External Subdomain No Text
/2024/02/26/universite-de-lora...Subdomain Université de Lorraine
/2024/02/26/universite-de-lora...Subdomain Text duplicate Trivial anchor text
Read More
https://www.softwareheritage.org/Anchor Back to top
https://mstdn.social/@swheritageNew window External No Text
http://www.linkedin.com/compan...New window External Subdomain No Text
/feedNew window Subdomain No Text
https://twitter.com/SwHeritageNew window External No Text
https://www.youtube.com/channe...New window External Subdomain No Text
/mission/Subdomain Text duplicate Mission
/people/Subdomain People
/legal/Subdomain Legal
/contact/Subdomain Contact
/mission/heritage/Subdomain Text duplicate Heritage
/mission/science/Subdomain Text duplicate Science
/mission/industry/Subdomain Text duplicate Industry
/jobs/Subdomain Jobs
/community/developers/Subdomain Text duplicate Developers
/community/scientists/Subdomain Text duplicate Scientists
/blog/Subdomain Text duplicate Blog
/donate/Subdomain Text duplicate Donate
https://www.unesco.org/en/arti...New window External Subdomain No Text
/?lang=enSubdomain Text duplicate English
/?lang=frSubdomain Français (French)
/?lang=esSubdomain Español (Spanish)

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://www.softwareheritage.org/"
HTTP header
(Important)
The X-powered header is sent within the response header. (unnecessary)
This page uses GZip for compressed data transmission.
Performance
(Somewhat important)
The page response time is slow (1.07 seconds). The response time should be less than 0.4 seconds. Slow websites are bad for search engine bots and also result in bad user experience.
The file size of the HTML document is fine (142 kB).

HTTP Response Header

NameValue
dateWed, 29 Jan 2025 08:44:33 GMT
serverApache
x-powered-byPHP/8.3.12
link<https://www.softwareheritage.org/wp-json/>; rel="https://api.w.org/", <https://www.softwareheritage.org/wp-json/wp/v2/pages/39253>; rel="alternate"; title="JSON"; type="application/json", <https://www.softwareheritage.org/>; rel=shortlink
set-cookie73 Characters
content-encodinggzip
strict-transport-securitymax-age=31536000
content-length25476
content-typetext/html; charset=UTF-8
via1.1 varnish (Varnish/6.3), 1.1 varnish (Varnish/6.3)
varyAccept-Encoding
x-cache-hits0
x-cacheMISS
accept-rangesbytes
age0
statuscode200
http_versionHTTP/2

External factors

This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 993 referring domains.
This page has 364,340 backlinks.
This page has backlinks from 782 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

# START YOAST BLOCK
# ---------------------------
User-agent: *
Disallow:

Sitemap: https://www.softwareheritage.org/sitemap_index.xml
# ---------------------------
# END YOAST BLOCK

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Search preview

www.softwareheritage.org
Home Page - Software Heritage

Most important keywords

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

KeywordResultRecheck
Software74%Check
Software Heritage72%Check
Heritage70%Check
Software Heritage archive63%Check
Software Heritage initiative62%Check
supports Software Heritage62%Check
Software Archive61%Check
Source Software60%Check
software projects60%Check
Research Software59%Check
Show more keywords and terms

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