Text Compare

Text Compare is a free online diff tool that lets you paste two blocks of text and instantly see every difference highlighted. Whether you're reviewing edits to a document, comparing two versions of source code, or checking what changed between drafts — this tool makes it visual and fast.

It supports three levels of comparison granularity (line, word, and character), configurable options to ignore whitespace or case differences, and provides summary statistics showing exactly how many additions, deletions, and unchanged lines exist. Everything runs in your browser — your text never leaves your device.

• Three diff modes: Line-level, word-level, and character-level comparison for different granularity needs
• Side-by-side view: Original and modified texts displayed in parallel with synchronized scrolling
• Inline diff view: Unified single-column view showing all changes in context
• Color-coded highlights: Additions in green, deletions in red, modifications in yellow
• Ignore whitespace: Skip differences caused by spaces, tabs, and trailing whitespace
• Ignore case: Treat uppercase and lowercase as identical
• Diff statistics: See counts of added, removed, modified, and unchanged lines at a glance
• Swap texts: One-click button to swap left and right panels
• Line numbers: Numbered lines for easy reference
• 100% client-side: No server processing — your data stays private

1. Paste original text: Enter or paste the original (or older) version of your text in the left panel.
2. Paste modified text: Enter or paste the changed (or newer) version in the right panel.
3. Set options: Choose your diff mode (Line, Word, or Character) and toggle Ignore Whitespace or Ignore Case as needed.
4. Click Compare: Hit the Compare button to generate the diff. Differences are highlighted immediately.
5. Review results: Scroll through the side-by-side or inline view. Use the statistics bar to see a summary of changes. Switch between Side-by-Side and Inline views as needed.

Use case 1 — Document editing: Paste your original paragraph on the left and the edited version on the right. Word-level diff will highlight exactly which words were added, removed, or changed.

Use case 2 — Code review: Compare two versions of a function. Line-level diff shows which lines changed, and character-level diff pinpoints the exact characters that differ.

Use case 3 — Data validation: Compare two CSV exports or configuration files to find discrepancies. Use Ignore Whitespace to focus on real data changes.

• Instant visual diff: No need to read through both texts manually — differences jump out in color
• Multiple granularity levels: Choose line, word, or character diff depending on how detailed you need
• Saves time: Compare lengthy documents or codebases in seconds
• Code-friendly: Monospace font and line numbers make it natural for code comparison
• Privacy-first: Everything runs locally — nothing uploaded, nothing logged
• No registration: Free, unlimited use, no account required