jsonpost
Comparison & Manipulation

JSON Diff / Compare Tool

Compare two JSON documents side-by-side with additions, deletions, and changes highlighted.

Runs entirely in your browser — your data never leaves your device.

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How to use this tool

  1. 1Paste the original JSON on the left and the new JSON on the right.
  2. 2Review additions, deletions, and changes highlighted in color.
  3. 3Use semantic mode to ignore key order and formatting.

Frequently asked questions

Is the comparison semantic?
Yes. It compares values structurally, so reordered keys and different formatting do not show as false differences.
Can it compare nested structures?
Yes. Differences are detected at any depth and shown with their full path.
Is my data uploaded to a server?
No. Every tool on JSONPost runs entirely in your browser using JavaScript. Your JSON never leaves your device, so it is safe to use with private or sensitive data.

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Format and beautify your JSON instantly with customizable indentation and a collapsible tree view.