Plagiarism Checker

Check whether passages of text appear elsewhere on the web.

Quick answer: Free Plagiarism Checker. Ensure your writing is 100% unique. Checks text securely via search APIs managed by your own private backend.

This tool needs the All Tools Together backend with a search provider. See /backend — set SEARCH_API_URL and SEARCH_API_KEY, then point NEXT_PUBLIC_API_BASE here.

compares sentences against web search results via your backend

Check whether sentences in your text already appear online by searching the web for matching passages and listing the sources found — powered by a search provider on your own backend.

How it works

  1. Input the essay or text block you wish to verify.
  2. The tool segments the text into queries and runs exact-match searches via your backend.
  3. Review any flagged sentences mapped to live internet source links.

Frequently asked questions

Why does plagiarism checking need a backend?

Real detection means searching the entire web for matching text, which requires a paid search API — there is no legitimate browser-only way to do it.

Does a match mean plagiarism?

Not necessarily — common phrases and quotes can match innocently. Use the flagged sources to judge in context.

How many sentences are checked?

Up to fifteen substantial sentences per check, to keep searches fast and within provider limits.