Compare JSON changes without the noise
A JSON diff makes it easier to review what changed between two API responses, configuration files, or test fixtures. Instead of manually scanning long, minified payloads, format both versions and inspect the added, removed, and modified lines side by side.
How to compare two JSON objects
- Paste the original document into the left editor.
- Paste the updated document into the right editor.
- Select Compare JSON to validate, format, and display the differences.
Private client-side comparison
The comparison runs locally in your browser, which makes the tool useful for debugging JSON that may contain internal IDs, API payloads, or configuration values. Still follow your organisation’s security policy before handling sensitive data in any browser tool.
JSON Diff FAQ
What is a JSON diff? ⌄
A JSON diff compares two JSON documents and highlights the lines or values that changed between them. It is useful for reviewing API responses, configuration updates, and test fixtures.
How do I compare two JSON files? ⌄
Paste the original JSON into the left editor and the modified JSON into the right editor, then select Compare JSON. The tool validates and formats both inputs before showing the differences.
Does this JSON diff tool upload my data? ⌄
No. Comparison and formatting happen in your browser. Your JSON is not uploaded to a server by this tool.
Why does the tool require valid JSON? ⌄
The tool parses each document before comparing it so the result is reliable and readable. Correct syntax errors in either input before running the comparison.
Can I use this tool for API responses? ⌄
Yes. It is well suited to checking changes between API responses, request payloads, saved configuration files, and JSON test data.