Text Similarity Calculator

Calculate line, word, or character similarity locally from equal versus inserted/deleted diff tokens.

Original text

Modified text

Granularity

——

Comparison runs locally in your browser. Interactive diff uses a bounded token count to avoid locking the page on extremely large inputs.

How to use this Text Similarity Calculator

Estimate text similarity from a deterministic edit alignment. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.