JSON Diff

Compare two JSON objects and instantly see what was added, removed, or changed. Semantic key based diff that ignores property order, runs entirely in your browser.

JSON Diff

Compare two JSON objects and see what was added, removed, or changed

Paste valid JSON in both fields to see a structured diff

Semantic diff: keys are matched by name, so property order does not matter. Comparison runs entirely in your browser.

What is a JSON Diff tool?

A JSON diff tool compares two JSON documents and reports exactly what changed: which keys were added, which were removed, and which values were updated. Unlike a plain text diff, a semantic JSON diff matches properties by name, so reordering keys does not produce false differences.

CodeHelper's JSON Diff parses both documents, walks them recursively including nested objects and arrays, and gives you a clear three way breakdown with change counts, all in your browser.

Key Features

  • Semantic comparison: keys are matched by name, so property order never matters.
  • Added, removed, changed: each category is shown separately with a total count.
  • Nested support: deep objects and arrays are compared recursively.
  • Swap sides: flip original and modified with one click.
  • Private: nothing is uploaded, the comparison runs locally.

How to use the JSON Diff tool

  1. Paste the original JSON in the left field.
  2. Paste the modified JSON in the right field.
  3. Read the added, removed, and changed panels.

Perfect for reviewing API response changes, config drift, snapshot tests, and data migrations.

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