Developer & Text · Text Diff

Compare two texts or files and see what changed

Quick answer

Paste two texts or open two files in Toolfox → Text Diff to see additions, deletions and changed lines side-by-side or unified, with word-level highlights. Ignore whitespace, case or line endings, and save a standard .diff. It runs entirely on your computer (Mac, Windows or Linux). Files are never uploaded.

Download free macOS, Windows and Linux · works offline

How to do it

  1. Open Text Diff.
  2. Paste the original and changed text, or open two files.
  3. Choose what to ignore: whitespace, case, line endings.
  4. Switch between side-by-side and unified views, then Save Diff.

Options you can set

  • Ignore whitespace changes
  • Ignore case
  • Ignore line-ending differences (CRLF/LF)
  • Context lines in exported diff

Good to know

  • Up to 500000 lines per side; very large comparisons show the first 100000 rows.

Text Diff FAQ

How large can the files be?

Up to 500,000 lines per side.

Does it detect CRLF vs LF differences?

Yes. It tells you when line endings differ and can ignore them.

Is Text Diff in Toolfox free?

Yes. Text Diff is one of 57 tools in Toolfox, a free app for Mac, Windows and Linux with no account, ads, limits or watermarks.

Does Text Diff upload my files?

No. Toolfox processes files on your own computer and works offline; your files are never uploaded.

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Updated 2026-10-18 · Toolfox v0.2.1