Errorcorrectionzoo.org - SEO Checker

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Overview of the SEO Check
Meta information
99% 
Page quality
52% 
Page structure
41% 
Link structure
98% 
Server
100% 
External factors
100% 
SEO Score
Response time
0.03 s
File size
11.10 kB
Words
224
Media files
0
Number of links
71 internal / 2 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Home | Error Correction Zoo
The length of the page title is perfect. (253 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
The Error Correction Zoo collects and organizes error-correcting codes.
The length of the meta description is perfect. (439 pixels out of 1000 max pixel length)
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
No canonical link is specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Server location: Germany
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 name is very long.
The domain is no subdomain.
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
citation_languageen
citation_authorPhilippe Faist
citation_titleThe Error Correction Zoo
citation_publication_date2025
citation_date2025
DC.titleThe Error Correction Zoo
DC.authorPhilippe Faist
DC.issued2025
descriptionThe Error Correction Zoo collects and organizes error-correcting codes.
mobile-web-app-capableyes
apple-mobile-web-app-capableyes
apple-mobile-web-app-status-bar-styledefault
apple-mobile-web-app-titleError Correction Zoo
theme-color#00007f
langen
twitter:cardsummary_large_image
twitter:site@theeczoo
twitter:creator@victorvalbert
twitter:imagehttps://errorcorrectionzoo.org/vv/eczogimage-d3e2cdb2.png
og:urlhttps://errorcorrectionzoo.org/
og:titleHome
og:descriptionThe Error Correction Zoo collects and organizes error-correcting codes.
og:imagehttps://errorcorrectionzoo.org/vv/eczogimage-d3e2cdb2.png
og:typearticle
Content-Typetext/html; charset=UTF-8

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Page quality

Content
(Critically important)
There are only 224 words on this page. Use at least 250 words to provide useful information.
Words from the H1 heading are not used in the page content.
Only 1 paragraph/s was/were found on this page.
The average number of words per sentence of 6 words is low.
11.6% 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.
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)
A viewport "width=device-width, initial-scale=1" 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 6 tags for this page.
Image SEO
(Somewhat important)
Alt text (alternative text) is correctly used on all found images.
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

No media files were found.

Page structure

H1 heading
(Critically important)
Welcome to the error correction zoo!
The H1 heading contains the words Welcome to! Use important keywords instead.
Too many H1 headings
Headings
(Important)
The heading structure is perfect.

Heading structure

Heading levelContent
H1 Welcome to the error correction zoo!
H1 Home Page
H1 More
Some anchor texts are used more than once.
The number of internal links is ok.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are 2 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://errorcorrectionzoo.org/No Text
/c/binary_linearLinear binary
/c/q-ary_additiveAdditive \(q\)-ary
/c/reed_solomonRS
/c/reed_mullerRM
/c/ldpcLDPC
/c/polarPolar
/c/rank_metricRank-metric
/c/spacetimeSTC
/c/stabilizerStabilizer
/c/cssCSS
/c/good_qldpcGood QLDPC
/c/surfaceKitaev surface
/c/colorColor
/c/topologicalTopological
/c/holographicHQECC
/c/eaqeccEAQECC
/c/gkpSquare-lattice GKP
/c/catCat
/domain/classical_domainClassical Domain ▸
/kingdom/bits_into_bitsBinary Kingdom
/kingdom/q-ary_digits_into_q-a...Galois-field Kingdom
/kingdom/matrices_into_matricesMatrix Kingdom
/kingdom/analogAnalog Kingdom
/kingdom/points_into_spheresSpherical Kingdom
/kingdom/rings_into_ringsRing Kingdom
/kingdom/group_classicalGroup Kingdom
/domain/quantum_domainQuantum Domain ▸
/kingdom/qubits_into_qubitsQubit Kingdom
/kingdom/qudits_into_quditsModular-qudit Kingdom
/kingdom/galois_into_galoisGalois-qudit Kingdom
/kingdom/oscillatorsBosonic Kingdom
/kingdom/spins_into_spinsSpin Kingdom
/kingdom/group_quantumText duplicate Group Kingdom
/kingdom/category_quantumCategory Kingdom
/domain/classical_into_quantum...Classical-quantum Domain ▸
/kingdom/qubit_classical_into_...Binary c-q Kingdom
/kingdom/bosonic_classical_int...Bosonic/analog c-q Kingdom
/listsCode lists ▸
/list/stabilizer_2d2D stabilizer codes
/list/stabilizer_3d3D stabilizer codes
/list/agAlgebraic-geometry codes
/list/approximate_qeccApproximate quantum codes
/list/list_asymmetricAsymmetric quantum codes
/list/good_qldpcAsymptotically good QLDPC codes and friends
/list/binary_linearBinary linear codes
/list/fock_stateBosonic Fock-state codes
/list/oscillator_stabilizerBosonic stabilizer codes
/list/classicalClassical codes
/list/classical_with_rateClassical codes with a rate
/list/decodersClassical codes with notable decoders
/list/coherent_state_c-qCoherent-state c-q codes
/list/list_colorColor code and friends
/list/combinatorial_designCombinatorial designs
/list/quantum_concatenatedConcatenated quantum codes and friends
/list/constant_excitationConstant-excitation quantum codes and friends
/list/constant_weightConstant-weight codes
/list/cyclicCyclic codes
/list/quantum_cyclicCyclic quantum codes and friends
/listssee all
https://errorcorrectionzoo.org/Home Page
/code_graphCode graph
/listsCode lists
/allAll codes
/conceptsGlossary of concepts
/referencesBibliographic references
/edit_codeAdd new code
/teamTeam
/aboutAbout
/aboutError correction zoo
/teammany contributors
http://creativecommons.org/lic...New window External CC-BY-SA License
https://github.com/errorcorrec...New window External how to contribute

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://errorcorrectionzoo.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 0.03 seconds.
The file size of the HTML document is fine (11 kB).

HTTP Response Header

NameValue
content-typetext/html; charset=UTF-8
content-length3388
last-modifiedThu, 05 Jun 2025 21:29:52 GMT
x-amz-server-side-encryptionAES256
x-amz-meta-etagtNEtDOiW2YJf7TOWbtf5Zg==
content-encodinggzip
accept-rangesbytes
serverAmazonS3
dateFri, 06 Jun 2025 06:22:12 GMT
cache-controlmax-age=7200, s-max-age=31536000
etag"7e22cdab5ef3d1e28853669bd290d882"
varyaccept-encoding
x-cacheHit from cloudfront
via1.1 8d07edb8bf98788bf512d51f8cc554f6.cloudfront.net (CloudFront)
x-amz-cf-popFRA56-P6
x-amz-cf-idIeYp7YPb5SpY7I1q3wcoHA_yjYR3nPoW0q6WlwXQk8XUShZgY_sKtg==
age4915
statuscode200
http_versionHTTP/2

External factors

This website has excellent links from other websites.
This page has backlinks from 359 referring domains.
This page has 715 backlinks.
This page has backlinks from 126 different ip addresses.

Links from Wikipedia

No links from Wikipedia were found.

Robots.txt

User-agent: *
Disallow: /gitpreview
Sitemap: https://errorcorrectionzoo.org/sitemap.xml

Similar sites

Search preview

errorcorrectionzoo.org
Home | Error Correction Zoo
The Error Correction Zoo collects and organizes error-correcting codes.

Most important keywords

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

KeywordResultRecheck
error85%Check
correction85%Check
zoo85%Check
error correction zoo85%Check
Welcome50%Check
codes46%Check
quantum codes40%Check
stabilizer codes40%Check
Classical codes40%Check
Page38%Check
Show more keywords and terms

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