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Compare two texts and visualize their differences with side-by-side or unified views
Compares two text inputs highlighting differences in side-by-side or unified view at word, line, or character granularity. Supports ignoring whitespace and case differences, file upload for both inputs, downloading the diff as a .patch file, and line numbering with added/removed/modified counts in a summary bar.
Comparing text versions is a fundamental development task that extends beyond version control. A standalone diff checker with configurable granularity and exportable patches handles arbitrary text comparison without committing.
Software developers reviewing code changes, writers comparing document revisions, data engineers verifying transformations, QA engineers comparing API responses, and anyone tracking changes between file versions.
Paste original text into left panel and modified text into right panel — or upload files via drag-and-drop
Select granularity: 'Word' (default), 'Line', or 'Character'
Configure options: 'Ignore Whitespace', 'Ignore Case', 'Trim Lines'
Choose view mode: 'Side-by-Side' or 'Unified' (single view with inline changes)
Review summary bar — shows added, removed, and unchanged counts
Click 'Download Patch' for .patch file compatible with git apply, or 'Swap' to exchange inputs
Original: 'Hello World' | Changed: 'Hello Earth' | Word => Shows 'World' deleted, 'Earth' insertedOriginal: 'function add(a,b){return a+b}' | Changed: 'function add(a, b) { return a + b; }' | Ignore Whitespace ON => 'No differences'Myers diff algorithm, the same algorithm used by Git.
Yes, but enable 'Ignore Whitespace' for CRLF vs LF.
'git apply <file>.patch' or 'patch -p0 < <file>.patch'.
~500,000 chars in line mode. Character-level diff has ~50,000 char limit.
Count words, characters, sentences, and analyze text readability with Flesch scores
Test and debug regular expressions with real-time matching, capture groups, and extended flags
Live preview and edit Markdown with syntax highlighting
Calculate subnet masks, CIDR notation, and IP ranges
Dive deeper with our comprehensive guides and tutorials.