How do I compare two JSON documents?
On the DevTools JSON Diff page, paste both JSON values and click Compare. The tool lists every changed path.
JSON Diff
DevTools JSON Diff compares two JSON documents side by side and lists added, removed, and changed field paths—all processed locally in your browser.
JSON A (original)
JSON B (compare)
About this tool
Useful for reviewing API version changes, config diffs, and test expectation comparisons. Differences are shown by path for quick pinpointing.
How to use
- Paste JSON A in the left input and JSON B in the right.
- Click Compare.
- Review the difference list.
FAQ
Are array order changes treated as differences?
Yes. Arrays are compared index by index, so reordering shows as modifications at the corresponding indices.
Can I ignore certain fields?
The current version compares all fields. Ignore rules may be added in a future release.
Is my JSON uploaded?
No. Comparison runs locally in your browser.
Related tools
- Converters
Convert between common formats: CSV/JSON, YAML/JSON, TOML/JSON, Markdown/HTML, timestamps, image Base64, text encodings, and number bases.
- Formatter
Format and beautify SQL, HTML, XML, and YAML, plus a regex debugger—all run locally in the browser, free with no sign-up.
- Favicon Generator
Upload a logo, preview browser and Google search results, configure iOS/Android icons, and generate a complete favicon package in one click.
- Encoding Tools
Base64, JWT, SHA256, MD5, HMAC, Bcrypt, RSA keys, SSL certificates, and password strength—common encoding and security text utilities.