Highlight structural changes between two versions of a Markdown document. Unified diff output showing added, removed, and changed lines. Free, browser-based.
Free is enough for most one-off jobs. Pro raises the file and batch caps; Pro + Media unlocks GB-scale streaming and unlimited duration.
Larger files supported on Developer (5 GB CSV) and Enterprise (unlimited). All processing happens in your browser — files never reach a server.
Drop File A (the original) and File B (the revised version)
The diff engine computes a unified diff showing every added and removed line
Review the colour-coded diff report — green for additions, red for removals
0 bytes uploaded. Markdown Diff runs entirely in your browser using JavaScript. Your markdown — including any secrets, PII, or proprietary content — never leaves your device. No data is sent to any server.
The diff is line-by-line using the unified diff algorithm (same as git diff). It highlights all changed lines but does not understand Markdown structure semantically.
Yes — both input slots support either file upload or paste-in text. Switch each slot between Paste and Upload mode independently.
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