Historical Page Comparison
Free, no signup. Compare one bounded Common Crawl capture with the current public page. Coverage is sampled evidence—not proof of every version that existed.
Checks run from our server; we fetch the URL you enter and don't keep the results. The exact URL is sent in a POST body to this site, then used for bounded Common Crawl index/WARC lookup and a safe current-page fetch. Results may be cached; raw archived HTML is not returned. Anonymous run-level outcome counters may be used for aggregate research; URLs, domains, IPs, and identifiers are never included, and no statistic is released below 100 runs.
Site passport Local context for this saved site
Local data
Saved targets, named lists, and recent check summaries remain only in this browser.
Observed page signals
Bounded text changes
How to use it
- Enter one exact public HTTP(S) page URL.
- Optionally choose a before date to prefer an older capture.
- Run the comparison and verify the capture timestamp and crawl index.
- Review changed signals and excerpts. A difference is a review prompt, not an automatic SEO defect.
Example result
A bounded comparison can show a capture timestamp and crawl index alongside a changed title, canonical, or structured-data type. It reports only the selected capture and current raw HTML; a missing capture or a difference is evidence to review, not a complete version history or an automatic SEO defect.
How it works
The service selects one date-relevant Common Crawl index record, reads one bounded WARC byte range, and fetches the current public page through the guarded endpoint. It extracts comparable raw-HTML facts and capped text excerpts; it does not replay archived JavaScript or subresources.
What it checks
The result compares the title, description, H1, word count, canonical URLHow search engines pick one canonical URL among duplicates and consolidate signals onto it., robots directivesThe robots meta tag is an HTML element in a page's head — <meta name="robots" content="noindex"> — that tells search engines how to index and serve that page. It's crawl-then-obey: a page blocked in robots.txt is never fetched, so the tag is never seen., and JSON-LDJSON-LD (JavaScript Object Notation for Linked Data) is a script-based structured data format, typically paired with the schema.org vocabulary to describe page content for search engines and AI systems. Google recommends it over Microdata and RDFa because it's the easiest format to implement and maintain at scale — but all three work, and structured data isn't a ranking signal. types. Similarity and excerpts use normalized extracted text from bounded raw HTML; they are not a rendered-page replay.
Common Crawl attribution and limitations
Historical capture data comes from Common Crawl; this site is not affiliated with it. Common Crawl samples the web, so captures can be absent, incomplete, truncated, or represented by revisit records without a payload. The tool queries only a few date-relevant crawl indexes and never promises lifetime coverage.
The comparison shows derived observations and small bounded excerpts—not a license to republish a third party’s archived page. Review the Common Crawl Terms of Use and any rights or terms that apply to the originating page before commercial reuse.
Frequently asked questions
What does the tool compare?
It compares one exact URL’s selected Common Crawl capture with the current public page: title, H1, meta description, canonical, robots directives, word count, structured-data types, bounded text similarity, and capped added/removed excerpts. Capture and current HTTP statuses are shown separately as source observations, not as a status-history comparison.
Does a missing capture mean the page never existed?
No. Common Crawl samples the web and does not capture every URL on every crawl. Missing, incomplete, revisit-only, and truncated records are reported as coverage limits rather than converted into a pass or failure.
Can I view or download the complete archived page?
No. The service retrieves one exact WARC byte range and returns only derived facts and bounded text excerpts. It does not provide a full-page archive viewer, execute archived JavaScript, or load archived subresources.
Can I use the result commercially?
This tool reports derived observations and does not grant rights in third-party archived content. Review Common Crawl’s current terms and the originating site’s rights before relying on archived material in a commercial product.
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Feature requests for Historical Page Comparison
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À propos de l’outil
Comparez une capture Common Crawl bornée à la page actuelle pour examiner les métadonnées, les canonical, les directives robots, les types de données structurées et les changements de texte extrait.
Fonctionnalités
- Comparaison des signaux title, H1, description et canonical.
- Constats séparés pour les statuts HTTP et la couverture d’archive.
- Extraits de texte bornés avec score de similarité.
- Traitement local des faits dérivés sans rejouer les scripts archivés.
Fonctionnement
Le service sélectionne un index Common Crawl pertinent, lit une plage WARC bornée et récupère la page publique actuelle via un endpoint protégé. Il extrait des faits HTML comparables et des extraits de texte limités, sans exécuter les sous-ressources archivées.
Limites
- Common Crawl peut manquer, tronquer ou revisiter des captures sans payload.
- Une différence est une preuve à examiner, pas automatiquement un défaut SEO.
- Les droits d’utilisation du contenu archivé restent à vérifier auprès de la source.
Questions fréquentes
Que compare l’outil ?
Il compare title, H1, description, canonical, robots, nombre de mots, types structurés et extraits de texte entre une capture et la page actuelle.
Une capture manquante signifie-t-elle que la page n’a jamais existé ?
Non. Common Crawl échantillonne le Web ; les captures manquantes ou incomplètes sont seulement des limites de couverture.
Puis-je utiliser le résultat commercialement ?
Vérifiez les conditions actuelles de Common Crawl et les droits du site d’origine avant toute réutilisation commerciale.