Compare
Original
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Modified
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Online Text & JSON Diff Comparison Tool
io9.me Compare Tool lets you find the differences between two blocks of text or JSON documents. Paste content into the left and right editors to see additions, deletions, and modifications highlighted instantly. All diffing runs locally in your browser.
Features
- Line-by-line, word-level, and character-level diff comparison
- Side-by-side and unified inline diff views
- JSON structural diff — compare objects, arrays, and nested values
- Color-coded highlighting for added, removed, and changed content
- Navigation between differences with keyboard shortcuts
- Copy diff output or download results
How to use
- Paste the original text or JSON in the left editor.
- Paste the modified version in the right editor.
- Differences are highlighted automatically.
- Switch between line, word, and character comparison modes.
Common use cases
Compare API responses before and after a code change, diff configuration files across environments, review text edits in documentation, compare JSON payloads from different API versions, and verify migration output.