OnSubmitSteps
- Paste raw JSON into the input.
- Choose the format mode.
- Check the status message for syntax errors.
- Copy the formatted output.
Development · free tool
JSON formatter for API payloads, logs and configuration files
Validate JSON syntax and format JSON, XML or SQL snippets for debugging and documentation.
Input and result
JSON syntax is checked and indented with 2 spaces. XML and SQL formatting is heuristic; it does not validate their syntax or schemas.
Use it well
How to use JSON Formatter
Common use cases
- API response debugging
- Indent compact payloads returned by APIs or webhooks.
- Configuration review
- Check JSON files before using them in apps or scripts.
- Documentation
- Prepare readable examples for technical docs.
FAQ
Frequently asked questions
What does a JSON formatter do?
It parses JSON and prints it with indentation so nested data becomes easier to read.
Can it fix invalid JSON?
It can show syntax errors, but you still need to correct invalid quotes, commas or brackets.
Can formatting change JSON values?
The tool parses JSON before indenting it. Numbers beyond JavaScript precision can be rounded, and only the last value of a repeated key is kept.
Are my inputs sent to a server?
OnSubmit tools run in the browser whenever the task can be processed locally. Avoid pasting production secrets, real banking details or personal data into public tools.