Threejs.org - SEO Checker

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Overview of the SEO Check
Meta information
80% 
Page quality
34% 
Page structure
95% 
Link structure
67% 
Server
100% 
External factors
100% 
SEO Score
Response time
0.16 s
File size
48.20 kB
Words
36
Media files
154
Number of links
6 internal / 168 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Three.js – JavaScript 3D Library
The length of the page title is perfect. (289 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)
No canonical link is specified.
Language
(Somewhat important)
Language defined in HTML: en
Server location: United States of America
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
viewportwidth=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0
langen
twitter:cardsummary_large_image
twitter:site@threejs
twitter:titleThree.js – JavaScript 3D library
og:imagehttps://threejs.org/files/share.png
charsetutf-8

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Page quality

Content
(Critically important)
There are only 36 words on this page. Use at least 250 words to provide useful information.
Some words from the page title are not used within the pages content
Words from the H1 heading are not used in the page content.
No paragraphs were detected.
The page contains a listing, which indicates a good text layout.
No placeholders texts or images were found.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
A viewport "width=device-width, user-scalable=no, minimum-scale=1.0, maximum-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 6 tags for this page.
Image SEO
(Somewhat important)
154 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
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/files/projects/threejs-journey.pngNo alt attribute provided
/files/projects/spline.pngNo alt attribute provided
/files/projects/procedural-gl.pngNo alt attribute provided
/files/projects/kodeclubs.pngNo alt attribute provided
/files/projects/midwam.pngNo alt attribute provided
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/files/projects/inkbots.pngNo alt attribute provided
/files/projects/pararty.pngNo alt attribute provided
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https://threejs.org/files/projects/nova.pngNo alt attribute provided
/files/projects/storyline.pngNo alt attribute provided
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https://threejs.org/files/projects/hubs.pngNo alt attribute provided
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/files/projects/webxr-sneakers.pngNo alt attribute provided
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/files/projects/react-three-fiber.pngNo alt attribute provided
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/files/projects/veolia.pngNo alt attribute provided
/files/projects/modelviewer.pngNo alt attribute provided
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/files/projects/infinitown.pngNo alt attribute provided
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/files/projects/shorttrip.pngNo alt attribute provided
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/files/projects/samsylab.pngNo alt attribute provided
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/files/projects/campoallecomete.pngNo alt attribute provided
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/files/projects/lucyhardcastle.pngNo alt attribute provided
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/files/projects/paperworld.pngNo alt attribute provided
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/files/projects/starmap.pngNo alt attribute provided
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https://threejs.org/files/projects/rome.jpgNo alt attribute provided
/files/projects/globe.jpgNo alt attribute provided

Page structure

H1 heading
(Critically important)
three.js r179
The H1 heading is too short (13 characters). It should be at least 20 Characters long.
Headings
(Important)
The heading structure is perfect.

Heading structure

Heading levelContent
H1 three.js r179
H2 Learn
H2 Tools
H2 Community
H2 Code
H2 Resources
H2 Merch
There are too few (6) internal links on this page.
Some anchor texts are used more than once.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are too many external links (168) on this page.

Found links on this page

LinkAttributesAnchor text
http://github.com/mrdoob/three...External r179
https://threejs.org/manual/docs
https://threejs.org/examples/examples
https://threejs.org/examples/Text duplicate examples
https://threejs.org/manual/documentation
https://chromewebstore.google....External Subdomain devtools
https://chat.openai.com/g/g-jG...External Subdomain gpt
https://threejs.org/editor/editor
https://threejs.org/playground/nodes
https://stackoverflow.com/ques...External questions
https://discord.gg/56GBJwAnUSExternal discord
https://discourse.threejs.org/External Subdomain forum
https://twitter.com/threejsExternal twitter
https://github.com/mrdoob/thre...External github
https://github.com/mrdoob/thre...External download
https://threejs-journey.xyz/New window External Three.js Journey
https://simondev.teachable.com...New window External Subdomain Three.js Game Development
https://threejsresources.com/New window External Three.js Resources
https://teespring.com/stores/t...New window External T-Shirts
https://discourse.threejs.org/...External Subdomain submit project
https://next.junni.co.jp/New window External Subdomain No Text
https://www.anumberfromtheghos...New window External Subdomain No Text
https://clipdrop.co/relightNew window External No Text
https://www.theatrejs.com/New window External Subdomain No Text
https://eyes.nasa.gov/apps/sol...New window External Subdomain No Text
https://needle.tools/New window External No Text
https://vrseat.vercel.app/New window External Subdomain No Text
https://neal.fun/design-the-ne...New window External No Text
https://coastalworld.com/New window External No Text
https://webgi-jewelry.vercel.app/New window External Subdomain No Text
https://www.google.com/doodles...New window External Subdomain No Text
https://virtual.bbcmic.ro/?dis...New window External Subdomain No Text
https://camera-webgi.vercel.app/New window External Subdomain No Text
https://www.kubota.com/futurec...New window External Subdomain No Text
https://hsmkrt1996.com/New window External No Text
https://choochooworld.com/New window External No Text
https://leap-for-mankind.com/New window External No Text
https://henryheffernan.com/New window External No Text
https://www.pola.co.jp/wecarem...New window External Subdomain No Text
https://david-hckh.com/New window External No Text
https://fungui.resn.co.nz/New window External Subdomain No Text
https://nodetoy.co/New window External No Text
https://jesse-zhou.com/New window External No Text
https://exp-infinite-passerell...New window External Subdomain No Text
https://windland-neotix.vercel...New window External Subdomain No Text
https://polygonjs.com/New window External No Text
https://sougen.co/New window External No Text
https://lab.julienverneaut.com...New window External Subdomain No Text
https://exp-gemini.lusion.co/New window External Subdomain No Text
https://exp-my-little-storyboo...New window External Subdomain No Text
https://www.youtube.com/watch?...New window External Subdomain No Text
https://madbox.io/New window External No Text
https://market.pmnd.rs/New window External Subdomain No Text
https://pendereckisgarden.pl/enNew window External No Text
https://rogueengine.io/New window External No Text
https://logartis.info/New window External No Text
https://blobmixer.14islands.com/New window External Subdomain No Text
http://spite.github.io/fuck-2020/New window External Subdomain No Text
https://unshift.jp/New window External No Text
https://eyes.nasa.gov/apps/mar...New window External Subdomain No Text
https://threejs-journey.xyz/New window External No Text
https://spline.design/New window External No Text
https://www.procedural.eu/New window External Subdomain No Text
https://www.kodeclubs.com/New window External Subdomain No Text
https://www.midwam.com/enNew window External Subdomain No Text
https://chartogne-taillet.com/enNew window External No Text
https://3dcomic.shop/inkbots/s...New window External No Text
https://pararty.com/New window External No Text
https://weedensenteret.no/New window External No Text
https://nova.app/New window External No Text
https://www.sbs.com.au/storyline/New window External Subdomain No Text
https://www.aquarium.ru/enNew window External Subdomain No Text
https://turbulent.ca/New window External No Text
https://patrickheng.com/New window External No Text
https://augmentedperception.gi...New window External Subdomain No Text
https://shutdown.gallery/New window External No Text
https://iss-sim.spacex.com/New window External Subdomain No Text
https://hubs.mozilla.com/New window External Subdomain No Text
https://domenicobrz.github.io/...New window External Subdomain No Text
https://webxr-sneakers.lusion.co/New window External Subdomain No Text
https://experiments.p5aholic.me/New window External Subdomain No Text
https://guillaumegouessan.com/New window External No Text
https://cineshader.com/New window External No Text
https://mixedreality.mozilla.o...New window External Subdomain No Text
https://www.operanorth.co.uk/t...New window External Subdomain No Text
https://kentatoshikura.com/New window External No Text
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https://bruno-simon.com/New window External No Text
https://garden-eight.com/New window External No Text
https://1955horsebit.gucci.com/New window External Subdomain No Text
https://github.com/react-sprin...New window External No Text
https://lusion.co/New window External No Text
https://36days.reflektor.digital/New window External Subdomain No Text
https://experience.eau.veolia.fr/New window External Subdomain No Text
https://modelviewer.dev/New window External No Text
https://hinderer-wolff.fr/New window External No Text
http://robinmastromarino.com/New window External No Text
https://jellymar.io/New window External No Text
https://krunker.io/New window External No Text
https://dotbigbang.com/New window External No Text
https://poki.com/en/g/crossy-roadNew window External No Text
https://hki.paris/xpNew window External No Text
https://epicskidmarks.com/New window External No Text
https://demos.littleworkshop.f...New window External Subdomain No Text
https://heraclosgame.com/New window External No Text
http://goinghome.302chanwoo.com/New window External Subdomain No Text
http://mathis-biabiany.fr/New window External No Text
https://dddance.party/New window External No Text
http://demos.littleworkshop.fr...New window External Subdomain No Text
http://taotajima.jp/New window External No Text
http://bertrandcandas.com/New window External No Text
https://hajimewatanabe.jp/port...New window External No Text
https://alexanderperrin.com.au...New window External No Text
http://vr.ff.com/us/New window External Subdomain No Text
https://tonite.dance/New window External No Text
https://emmitfenn.com/New window External No Text
https://panic.com/transmit/New window External No Text
http://showroom.littleworkshop...New window External Subdomain No Text
https://beinternetawesome.with...New window External Subdomain No Text
http://www.larsberg.net/New window External Subdomain No Text
http://letsplay.ouigo.com/New window External Subdomain No Text
https://moments.epic.net/New window External Subdomain No Text
https://within-unlimited.githu...New window External Subdomain No Text
http://lab.samsy.ninja/New window External Subdomain No Text
https://2050.earth/New window External No Text
http://campoallecomete.it/New window External No Text
https://saydnaya.amnesty.org/New window External Subdomain No Text
https://lucyhardcastle-thefift...New window External Subdomain No Text
http://christmasexperiments.com/New window External No Text
https://paperplanes.world/New window External No Text
http://www.mentaltoy.com/resou...New window External Subdomain No Text
http://tympanus.net/codrops/20...New window External No Text
http://particle-love.com/New window External No Text
https://virtualart.chromeexper...New window External Subdomain No Text
http://www.lhbzr.com/New window External Subdomain No Text
http://homunculus.jp/New window External No Text
http://2016.makemepulse.com/New window External Subdomain No Text
https://aframe.io/New window External No Text
https://kamra.invisi-dir.com/New window External Subdomain No Text
http://rainforest.arkivert.no/New window External Subdomain No Text
https://robertsspaceindustries...New window External No Text
https://www.uberviz.io/New window External Subdomain No Text
http://networkeffect.io/New window External No Text
http://unseen-music.com/yume/New window External No Text
http://www.playkeepout.com/New window External Subdomain No Text
http://renaultespace.littlewor...New window External Subdomain No Text
http://cabbi.bo/enough/New window External No Text
http://www.dennis.video/New window External Subdomain No Text
http://www.sbs.com.au/theboat/New window External Subdomain No Text
http://earth.plus360degrees.com/New window External Subdomain No Text
http://phoboslab.org/wipeout/New window External No Text
http://vaalentin.github.io/2015/New window External Subdomain No Text
http://www.clicktorelease.com/...New window External Subdomain No Text
http://a-way-to-go.com/New window External No Text
http://www.heroforge.com/New window External Subdomain No Text
http://cabbi.bo/New window External No Text
http://pablotheflamingo.com/New window External No Text
http://www.shapespark.com/New window External Subdomain No Text
http://www.potree.org/New window External Subdomain No Text
http://www.overthetinyhills.com/New window External Subdomain No Text
https://gorescript.github.io/c...New window External Subdomain No Text
https://stewartsmith.io/work/r...New window External No Text
http://www.georgeandjonathan.com/New window External Subdomain No Text
http://carvisualizer.plus360de...New window External Subdomain No Text
http://kiddisco.asmallgame.com/New window External Subdomain No Text
https://helloenjoy.itch.io/hel...New window External Subdomain No Text
https://acko.net/New window External No Text
http://hexgl.bkcore.com/New window External Subdomain No Text
http://carvisualizer.plus360de...New window External Subdomain No Text
http://www.sketchpatch.net/lab...New window External Subdomain No Text
http://idflood.github.io/Three...New window External Subdomain No Text
https://helloenjoy.itch.io/lightsNew window External Subdomain No Text
https://rome.mrdoob.com/New window External Subdomain No Text
https://experiments.withgoogle...New window External Subdomain No Text

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://threejs.org/"
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 is excellent with 0.16 seconds.
The file size of the HTML document is fine (48 kB).

HTTP Response Header

NameValue
serverGitHub.com
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x-origin-cacheHIT
last-modifiedTue, 05 Aug 2025 01:30:59 GMT
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via1.1 varnish
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content-length7811
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http_versionHTTP/2

External factors

This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 5,814 referring domains.
This page has 227,172 backlinks.
This page has backlinks from 3,679 different ip addresses.

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Most important keywords

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

KeywordResultRecheck
three75%Check
r17950%Check
Code40%Check
Resources38%Check
Learn38%Check
Tools38%Check
Community38%Check
Merch38%Check
editor36%Check
nodes36%Check
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