Text & Code Diff

Compare with smart highlighting

Original
Modified

Text & Code Diff Tool

Compare text, code, and documents with smart character-level highlighting that shows exactly what changed. Unlike traditional diff tools that highlight entire lines when only one character changed, our tool uses intelligent intra-line comparison to reduce visual noise by 70-80%.

All processing happens entirely in your browser — no uploads, no server-side processing, instant results. Perfect for code review, debugging, configuration management, and merge conflict resolution. Compare two versions side-by-side or in unified view, with real-time statistics showing additions, deletions, and modifications.

Features include three comparison modes (character, word, line), two view modes (side-by-side split, unified inline), smart detection of modified lines with character-level changes highlighted, diff statistics, copy/download results, and a clean ad-free interface optimized for developer workflow.

Key Capabilities

  • Smart intra-line highlighting: When only part of a line changed, we show exactly which characters were added, removed, or modified. No more entire lines highlighted red/green when only one word changed.
  • Three comparison modes: Character-by-character (exact changes), word-by-word (semantic changes), and line-by-line (traditional diff view). Switch modes to see changes at different granularities.
  • Two view modes: Side-by-side split view (parallel columns for visual comparison) and unified inline view (single column with +/- indicators, like Git diffs).
  • Modified line detection: Automatically detects when a line was modified (not just deleted and re-added) using similarity analysis. Shows character-level changes within those lines.
  • Real-time statistics: Instant summary showing number of additions (green), deletions (red), modifications (yellow), and unchanged lines. Understand the scope of changes at a glance.
  • Client-side processing: All comparisons happen in your browser using JavaScript. No file uploads, no server storage, no privacy concerns. Works offline after initial page load.
  • Copy & export: Copy individual text versions or export the complete diff result. Download as text file for documentation or sharing with your team.

Privacy & Performance

100% client-side processing: All diff computations happen in your browser. Your code, documents, and sensitive data never leave your device. No server uploads, no data storage, no logging.

Instant results: No network latency. Diffs are computed locally using optimized algorithms, giving you instant feedback even for large files. Compare 10,000+ line files in under a second.

Zero ads, zero tracking: Clean, focused interface with no advertisements or analytics scripts. Built for developer productivity, not monetization through data collection.

How to Use

  1. Paste or type your original text/code in the left panel.
  2. Paste or type your modified text/code in the right panel.
  3. Changes are highlighted automatically — green for additions, red for deletions, yellow for modifications.
  4. Use Comparison Mode to switch between character, word, or line-level diffs.
  5. Toggle View Mode to switch between side-by-side (split) and unified (inline) layouts.
  6. Check the statistics panel to see totals for additions, deletions, and modifications.
  7. Use the Swap button to reverse left and right panels.

Frequently Asked Questions