What this tool is good for
This tool compares two JSON payloads and highlights their differences directly in the editors. It is useful when you need to verify whether two API responses, config objects, or test fixtures are truly the same.
How to use it
- Paste the first JSON object into the left editor.
- Paste the second JSON object into the right editor.
- Wait a moment for the comparison to run automatically and highlight differences.
Practical notes
- Invalid JSON on either side stops the comparison until that side is fixed.
- Added and removed fields are highlighted differently from replaced values.
- If you first need to clean up a payload before comparing it, use the JSON Formatter first.
FAQ
Can this JSON diff tool compare nested objects and arrays?
Yes. It compares nested JSON structures and highlights changed, added, or removed fields so you can inspect differences inside API responses, fixtures, and configuration objects.
Why does the comparison fail when my JSON looks correct?
One side may still contain invalid JSON syntax, such as trailing commas, single-quoted strings, unmatched brackets, or hidden characters copied from logs. Format each side first if parsing fails.
Should I sort JSON keys before comparing two payloads?
Sorting keys can make visual review easier when field order is different. It does not replace semantic review, especially when arrays are ordered or the original field order has business meaning.
Related tools
- JSON Formatter：Format, edit, and validate JSON online
- JSON/XML Converter：Convert JSON to XML and XML to JSON