JSON Diff / Compare

Left JSON

Right JSON

Why Use JSON Diff & Compare?

JSON Diff & Compare helps you quickly identify differences between two JSON files. It highlights added, removed, and modified values side-by-side, making it easier to review configuration changes, API responses, and data updates accurately.

Key Features

  • Side-by-side JSON comparison
  • Inline difference highlighting
  • Previous and Next change navigation
  • Merge changes from left to right or right to left
  • Upload JSON files or paste directly
  • Edit JSON and re-compare instantly
  • Download merged JSON to local system
  • Privacy-friendly: all processing happens in your browser

How to Use JSON Diff

  1. Paste or upload JSON data into both Left and Right editors.
  2. Click Compare to view highlighted differences.
  3. Use Previous and Next buttons to navigate changes.
  4. Use merge arrows to apply changes from one side to the other.
  5. Edit JSON if needed and click Compare again.
  6. Click Save to download the merged JSON file.

Frequently Asked Questions

What types of differences does this tool detect?

The tool detects added keys, removed keys, and modified values, including nested JSON structures.

Does this JSON Diff tool store my data?

No. All JSON comparison and merging happens locally in your browser. Your data is never uploaded or stored.

Can I merge changes from one JSON to another?

Yes. You can merge changes from left to right or right to left using merge arrows or by editing directly in the editor.

Does it support large JSON files?

Yes. The tool supports large JSON files. Performance depends on your browser and system memory.