JSON Difference Checker | Compare JSON Files, Objects & API Responses
Compare two JSON files or objects and detect differences instantly. Identify added, removed, and modified fields using a structural JSON diff algorithm built for developers. Runs 100% client-side.
Frequently Asked Questions
What is a JSON diff checker?▼
A JSON diff checker is a tool that compares two JSON files or objects and highlights the differences between them. It detects added, removed, and modified fields by analyzing the JSON structure instead of raw text.
How do I compare two JSON files online?▼
Paste the original JSON into the left editor and the updated JSON into the right editor, then run the comparison. The tool performs a structural JSON diff and visually highlights all changes.
How is JSON diff different from text or Git diff?▼
Unlike text-based or Git diff tools, a JSON diff checker ignores formatting, whitespace, and key order. It compares actual JSON values and structure, ensuring only meaningful data changes are shown.
Does this JSON diff tool support nested objects and arrays?▼
Yes. The tool fully supports deeply nested JSON objects and arrays, making it suitable for comparing complex API responses and hierarchical data structures.
Can I use JSON diff to compare API responses?▼
Yes. This tool is ideal for comparing API responses across environments, validating payload changes, and debugging data mismatches during development and testing.
Should I format JSON before comparing it?▼
Yes. Formatting JSON before comparison improves readability and reduces noise. You can use the JSON Formatter to validate and clean both files before running the diff.
Is this JSON diff checker secure for sensitive data?▼
Yes. All comparisons happen entirely in your browser. No JSON data is uploaded, logged, or stored on any server.
Can this tool handle large JSON files?▼
Yes. The JSON diff checker supports large files and complex structures. Performance depends on your device, but most files up to several megabytes are processed quickly.
Is this JSON diff checker free to use?▼
Yes. This tool is completely free with no sign-up, no usage limits, and no data tracking.
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