Historical Page Comparison
Free, no signup. Compare a bounded Common Crawl capture with the current page, or select two sampled captures and compare them. Coverage is evidence—not proof of every version that existed.
Choices come from at most four date-near crawl indexes and sixteen exact-URL candidates. They are not a complete lifetime history.
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, in current-page mode, a safe current fetch. Capture choices expose timestamps and crawl indexes—not WARC locations. 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 center the bounded lookup on an older period.
- Keep historical-versus-current mode, or choose two historical captures and find the bounded candidates.
- Verify the selected timestamps and crawl indexes, then run the comparison.
- Review changed signals and excerpts. A difference is a review prompt, not an automatic SEO defect.
Example result
A bounded comparison can show two capture timestamps and crawl indexes alongside a changed title, canonical, or structured-data type. It reports only derived facts and capped excerpts; 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 queries at most four date-near Common Crawl indexes and retains at most sixteen exact-URL candidates. It reads only the selected bounded WARC byte range or ranges and fetches the current public page only in historical-versus-current mode. 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 can compare one exact URL’s selected Common Crawl capture with the current public page, or compare two captures from the same bounded candidate set. It checks title, H1, meta description, canonical, robots directives, word count, structured-data types, bounded text similarity, and capped added/removed excerpts. HTTP statuses remain source observations, not 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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