JSON Diff

How to use

1. Paste, type, drag-and-drop or upload the original JSON on the left and the modified JSON on the right.
2. Differences are computed automatically. Added values are green, removed are red, changed are amber and type changes are purple.
3. Click any entry in the Differences panel or use Alt+↑ / Alt+↓ to jump between changes. Filter by type with the summary chips.
4. Switch to Text diff for a classic side-by-side line comparison, or open Export to copy a JSON Patch, Markdown table or PDF report.
5. Use Share to copy a link that reproduces the comparison, and tabs to keep several comparisons open.

Why use a semantic JSON diff?

Plain text diff tools treat JSON as lines of characters, so reordering keys, reformatting or changing indentation produces noisy results. A semantic JSON compare parses both documents and compares the data itself: the same object written in a different order is reported as identical, and each real change is reported once with its path, for example orders[1].status.

JSONDiff.in highlights changes directly inside the editors you are working in, lists every difference with its old and new value, and can turn the result into an RFC 6902 JSON Patch, a Markdown table for a pull request or a printable report. Options let you ignore volatile keys such as timestamps, compare arrays as unordered sets and match array items smartly.

Typical use cases

• Comparing API responses between environments or versions
• Reviewing configuration changes (package.json, tsconfig, Kubernetes manifests converted from YAML)
• Checking what a migration or script changed in a document
• Spotting type changes, such as a number that became a string, before they break a client

What this JSON compare tool does

• Compare JSON online in real time. Paste or drop two documents and the comparison runs as you type; large files switch to a manual Compare button so typing stays smooth.
• Find the difference between two JSON objects, not two texts. Reordered keys, indentation and whitespace are ignored; every change is reported with its path and both values.
• Smart array comparison. Inserting or deleting an item is reported once instead of shifting every following item, and arrays can be compared as unordered sets.
• Ignore noisy keys. Skip timestamps, ids or any path so only meaningful changes remain.
• Export the diff. Copy an RFC 6902 JSON Patch, a Markdown table for a pull request, CSV, an HTML report or a PDF.
• Share and resume. A share link reproduces the exact comparison, and tabs keep several comparisons saved in your browser.
• Validate and repair. Syntax errors show the exact line and column, and the Repair action fixes quotes, commas and comments automatically.
• Private by design. The JSON diff runs 100% in your browser: no upload, no account, no limits.

Frequently asked questions