Developer
JSON Compare
- Browser-based
- No signup
Paste JSON on the left and right to compare them structurally. Object keys are matched by name (order ignored), and array items by index. Differences are listed as added, removed, or changed paths with values. Comparison runs entirely in your browser.
100% Client-Side
Your data never leaves your computer.
How to use this tool
1. Paste source text, code, or data into the JSON Compare input panel. 2. Choose transform or validation options shown for JSON Compare. 3. Run JSON Compare or read automatic output. 4. Review errors or diff output carefully. 5. Copy the transformed result. Processing runs in your browser; inputs are not uploaded to our server.
Worked example
Example: paste a small sample input into JSON Compare, run the transform or validation, and compare the output with the before text—fix any syntax errors reported before copying.
How it works
Paste JSON on the left and right. Both sides are parsed, then compared structurally: object keys are matched by name (order does not matter), and array items are matched by index. Differences are listed as added, removed, or changed paths. Comparison runs entirely in your browser.
Limitations
Results are based on the inputs you provide and may not cover every edge case. This tool is for general use and is not professional advice.
Privacy and file handling
Your data is processed in your browser and is not uploaded to our server.
Frequently asked questions
Does object key order matter?
No. Object keys are matched by name, so {"a":1,"b":2} and {"b":2,"a":1} are equal. Array item order does matter.
What kinds of differences are shown?
Each difference is marked as added (only on the right), removed (only on the left), or changed (present on both sides with different values or types).
Is my JSON stored?
No. Comparison runs locally in your browser and input is not stored.
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