What it does

Text Diff compares two texts and shows what changed — like a GitHub pull-request review, but for any pair of strings. Granularity flips between line, word, and character level; intra-line highlights make small edits easy to spot inside otherwise-identical lines.

How it works

• Myers' diff algorithm via the diff npm package powers the comparison — same algorithm git uses internally.
• Output formats: side-by-side or unified view in the UI; "Download patch" emits a unified-diff .patch file ready for git apply or patch -p1.
• Granularity can be toggled mid-comparison — the diff recomputes against the current pair of texts at the new tokenisation.

Limits

• Three-way merge with conflict markers isn't supported.
• Binary file comparison isn't supported.
• Syntax-aware diffing for code (e.g. ignoring whitespace inside strings) isn't supported.
• Performance stays smooth up to a few thousand lines per side; character-level diff slows perceptibly past that, line-mode stays fast.

Privacy

The comparison runs entirely in your browser. Text never leaves the device — no upload, no logging. Patch files are generated as download blobs.