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Text Match and Public Source Check

Compare text with a verified corpus and, with separate consent, discover additional public candidates that this site verifies and scores locally.

Protected server-side checkNo permanent storage by default

Request scope

This site compares at most the first 12,000 normalised words with the verified corpus and eligible candidate pages. Optional web discovery runs only when you select it for this check and selects phrases from at most the first 12,000 eligible words; the submitted text is never sent in full to LangSearch.

Text to check for matches

0 of 120,000 characters. At most the first 12,000 normalised words are compared for this request. The submitted text is not added to the corpus or sent in full to LangSearch.

Supplementary known sources — optional

The automatic corpus check works without this field. Add pages only when you want them included in the same report.

Additional public page URLs

One public HTTP(S) URL per line, up to 6. Across supplied and LangSearch-discovered candidates, at most 8 pages are attempted, with supplied URLs first; the shared 25-second deadline may reduce that number. The protected fetcher observes access rules and compares only visible text.

The check starts only after you press the button.

About this check

What the tool checks

The check searches our own verified corpus automatically. For an individual check you may also consent to bounded LangSearch candidate discovery. Provider results are never treated as matches: permitted public pages are fetched by this site and every displayed percentage is calculated locally.

How this check works

At most the first 12,000 normalised words of the submitted text are compared automatically with fingerprints in the verified corpus and with eligible candidate pages.
The closest documents are checked in detail, overlapping evidence is merged into readable passages, and coverage is calculated from the query words covered by confirmed matches.
Only when you select the optional box for this check are 2–3 filtered nine-word fragments selected from at most the first 12,000 eligible words and sent to LangSearch. The query field, including quotation marks and OR separators, is no more than 500 bytes; the submitted text is never sent in full.
Returned URLs are candidates only. This site validates and fetches permitted public pages, then calculates exact matches locally. This site does not retain the raw provider response, snippets or query phrases. Checked URLs, local excerpts and evidence may be retained only in a report you explicitly save; candidates are not added automatically to the corpus.
You may add up to six known public pages. Across supplied and LangSearch-discovered candidates, at most eight pages are attempted, with supplied URLs first; the shared 25-second deadline may reduce that number. Exact Google and Bing searches remain a supplementary manual check.

What this check cannot establish on its own

Coverage applies only to the sources and corpus date shown in the report. New, private, excluded or unavailable pages may be absent.
Exact matching may miss paraphrases, translations and heavily edited text. A match does not establish authorship or infringement; quotations, licences and context require human review.
LangSearch is an optional external service with separate availability and quotas. If configuration is missing, consent is declined, a limit is reached or the provider fails, the check continues with the corpus and explicitly supplied URLs; the failure never becomes an originality or uniqueness verdict.

Data sources

The first-party verified corpus: source URLs, crawl records and text fingerprints from sources with recorded control, permission or an applicable licence. Full third-party HTML and article text are not retained in the index.
LangSearch Web Search API — candidate URL discovery only after separate consent
Any supplementary public URLs explicitly supplied by the user for the current check.
Google Search Help: exact phrases

Text Match and Public Source Check

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