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Text Similarity Checker

Find out how alike two pieces of text are.

  • Free
  • No sign-up
  • Runs in your browser
Overall similarity
78%
Very similar
Shared vocabulary
64%
Jaccard index
Character match
69%
Edit distance
Shared 3-word phrases
2
33%

The quick brown fox jumps over the lazy dog near the river bank.

A quick brown fox leaped over a lazy dog by the river.

Shared phrases: “quick brown fox”, “over lazy dog”

Overall similarity is cosine similarity of word counts — good for spotting reworded copies. It measures wording, not meaning, and isn't a plagiarism verdict.

Everything you type is processed in your browser. Nothing you enter is sent to our servers or stored by us.

How to use the Text Similarity Checker

  1. Paste text A and text B.
  2. Read the similarity scores.
  3. Check highlighted shared words and phrases.

What does this tool do?

Cosine similarity compares word frequencies and is good at catching reworded copies; the Jaccard index measures shared vocabulary; edit distance compares character by character. Shared three-word phrases point to copied passages. Scores measure wording, not meaning.

Everything runs in your browser — nothing you paste is uploaded.

Why use it?

  • Three measures.
  • Highlights shared words.
  • Lists shared phrases.

Accuracy and limits

  • This compares only the two texts you provide — it doesn't search the web, so it isn't a full plagiarism checker.

Privacy

Everything you type is processed in your browser. Nothing you enter is sent to our servers or stored by us. There's no account to create and nothing to install.

Last reviewed by the M2Toolkit team.

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