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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Informazioni sullo strumento
Confronta una cattura Common Crawl con i segnali SEO e il testo estratto della pagina pubblica corrente.
Funzionalità
- Confronto di title, H1, description, canonical, robots e dati strutturati.
- Timestamp della cattura e indice di crawl come osservazioni separate.
- Similarity e excerpt di testo limitati e normalizzati.
- Nessun replay di JavaScript o subresource archiviate.
Come funziona
Inserisci una URL esatta e, se vuoi, una data limite. Il servizio sceglie un record di indice pertinente, legge un intervallo WARC delimitato e confronta fatti HTML raw con la pagina corrente.
Limitazioni
- Common Crawl campiona il web: catture mancanti, incomplete, troncate o solo revisit sono limiti di copertura.
- Le osservazioni non sono una cronologia completa né una licenza per ripubblicare contenuti di terzi; verifica termini e diritti.
Domande frequenti
Che cosa confronta il tool?
Confronta title, H1, meta description, canonical, direttive robots, word count, tipi di dati strutturati, similarity del testo ed excerpt aggiunti o rimossi.
Una cattura mancante significa che la pagina non è mai esistita?
No. Common Crawl non cattura ogni URL; assenza, incompletezza e revisit-only sono limiti di copertura, non una prova storica.
Posso usare il risultato commercialmente?
Il report mostra osservazioni derivate e non concede diritti sul contenuto archiviato; verifica Terms of Use e diritti del sito di origine.
Posso vedere o scaricare la pagina archiviata completa?
No. Restituisce un intervallo WARC e fatti o excerpt delimitati, senza viewer completo, script o subresource.