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JSON Diff Tool
The world's fastest, privacy-first JSON comparison tool. Intelligent structure-based diff, not just text comparison.
Fastest Processing
100% Private
No Upload Required
No Tracking
Comparison Options
Left JSON
Valid JSON
No JSON content
Upload a file, paste JSON, or start typing to begin
Right JSON
Valid JSON
No JSON content
Upload a file, paste JSON, or start typing to begin
Lightning Fast
Optimized algorithm with Web Worker support for large files. Handles 5MB+ JSON files without freezing your browser.
Privacy First
All processing happens in your browser. Your JSON data never leaves your device. No upload, no tracking, no storage.
Intelligent Diff
Structure-aware comparison that understands JSON semantics. Not just text diff - real JSON object comparison.