About this tool
The JSON Formatter cleans up messy JSON into readable, indented form and validates it at the same time, pinpointing syntax errors with a clear message. You can also minify JSON to the smallest possible size for production. It is an everyday essential for developers working with APIs, config files and data exchange — all processed locally in your browser.
How to use
- 1Paste your JSON into the input.
- 2Click Format to beautify or Minify to compress.
- 3Fix any errors highlighted, then copy the result.
Benefits
- Formats and validates in one step.
- Clear, human-readable error messages.
- Choose indentation and minify mode.
Read and verify formatted JSON
Practical example
Formatting a compact API response adds indentation and line breaks without changing its keys or values. Validation errors usually point near a missing quote, comma or closing bracket.
Interpreting the result
A successful parse proves that the input follows JSON syntax. It does not prove that required fields exist, values have the expected types or the data is safe for an application.
Limits and common mistakes
JSON does not allow comments, trailing commas, undefined values or single-quoted strings. Large or sensitive production payloads should be handled according to your organization’s data policy.
Detailed guides for this tool
Learn the underlying concepts, worked examples and common mistakes before relying on the result.
Frequently asked questions
Does it validate JSON too?+
Yes. If your JSON is invalid, the tool shows exactly what and where the problem is.
Is my data safe?+
Completely. JSON is parsed in your browser and never sent to a server.