🔀

Text Diff Checker

New

Compare two texts and see every difference highlighted instantly

Original Text1 lines
Changed Text1 lines
Browser-based, files never uploaded Instant results Works on any device

How to use Text Diff Checker

  1. 1Paste the original text in the left box
  2. 2Paste the changed text in the right box
  3. 3Differences highlight instantly — green for added, red for removed
  4. 4Use ignore case and ignore whitespace options for flexible comparison

About this tool

Compare two versions of any text side by side. Added lines show in green, removed lines in red, with line numbers and a similarity score. Perfect for comparing contracts, code, essays, and document revisions.

text difftext comparediff checkercompare two textstext difference checker

Frequently asked questions

How does the text comparison work?

The tool uses the LCS (Longest Common Subsequence) algorithm — the same approach used by Git and professional diff tools — to identify added, removed, and unchanged lines.

Can I compare code files?

Yes — the diff checker works with any text including code. The monospace font and line numbers make code comparison clear.

Is there a size limit?

The tool handles documents of many thousands of lines smoothly in the browser.