Free Online JSON Compare Tool
Compare two JSON objects side-by-side and spot differences instantly. Free online JSON diff viewer for developers.
data_object Left (Original)
data_object Right (Changed)
Key Features
Side-by-Side Comparison
View both JSON objects simultaneously with a clear diff output.
Color-Coded Diffs
Added, removed, and changed fields are highlighted with distinct colors.
Instant Results
All comparison happens locally in your browser with no server roundtrips.
Privacy Protected
Your JSON data never leaves your browser. No data uploaded to servers.
Frequently Asked Questions
How does JSON comparison work?
The tool parses both JSON inputs and recursively compares all keys and values. Added, removed, and changed fields are highlighted with different colors.
Is this tool free?
Yes. Completely free with no signup required. All processing runs locally in your browser.
Does it handle nested objects?
Yes. The comparison is recursive and supports deeply nested objects and arrays, showing the full path to each difference.
Can I compare large JSON files?
The tool handles files up to a few MB. For very large files, consider splitting them into smaller chunks first.
Does the tool upload my data?
No. All processing happens locally in your browser. Your data never leaves your device.
Related Tools
What related JSON tools are available?
Check out these related tools:
- JSON Formatter — Format, validate, and prettify JSON data.
- JSON Validator — Validate JSON syntax with detailed error messages.
- JSON Schema Generator — Generate JSON Schema from your JSON data.
- JSON Schema Validator — Validate JSON against a JSON Schema.