Compare two texts and highlight additions and removals.
Spotting the differences between two versions of a document by eye is slow and unreliable, especially with longer text where small edits can easily be missed. This tool compares two blocks of text and highlights exactly what was added and what was removed, using the same underlying comparison approach used in code version control systems.
It's useful for proofreading edited drafts, comparing contract revisions, checking changes in AI-rewritten text, or reviewing any situation where you need to know precisely what changed between two versions.
What's the difference between word-level and character-level diff?
Word-level diff (the default) compares whole words at a time, which is easier to read for prose. Character-level diff compares individual characters, which can be more precise for spotting small typo-level changes.
Can I use this to compare code snippets?
Yes, though for full source code files a dedicated code diff tool with syntax awareness may give more readable results for very large files.
Is my text uploaded anywhere?
No — the comparison runs entirely in your browser using JavaScript. Neither text is sent to any server.