01 / Fast steps
- Paste the original JSON.
- Paste the changed JSON.
- Review the list of differences, updated as you type.
JSON Diff Checker
Paste two JSON documents to instantly see which keys were added, removed or changed between them.
Updates instantly as you type
02 / Best for
- Comparing two versions of an API response.
- Checking what changed between two config files.
- Reviewing a data migration or export for unexpected changes.
03 / Why here
- Compares by structure and value, ignoring key order and whitespace.
- Updates instantly as you type, no need to click run.
- Runs entirely in your browser.
04 / Keep in mind
- Treats arrays positionally: reordering array items is reported as a change.
Tool connections
Related tools
01Favicon GeneratorTurn any image into a complete favicon set: ICO, PNG sizes, apple-touch-icon, web manifest and ready-to-paste HTML.02JSON FormatterFormat and validate JSON for debugging, APIs and config files.03SQL FormatterFormat and beautify SQL queries with proper indentation and keyword casing, right in your browser.04JSON to TypeScriptGenerate TypeScript interfaces from JSON, with nested types, optional fields and union detection.05JSON to YAMLConvert JSON into clean, readable YAML for configs, pipelines and Kubernetes manifests.06YAML to JSONConvert YAML configs and manifests into formatted JSON, with clear errors on invalid syntax.
Good to know
Questions & answers
01Does key order matter?
No, for objects the keys are compared by name, not by their order in the document.
02How are array differences shown?
Array items are compared by their position (index), so an item added in the middle will shift and report every following index as changed.
03Is JSON Diff Checker free to use?
Yes, JSON Diff Checker is completely free, with no sign-up and no usage limits. It runs entirely in your browser, so your data never leaves your device.