JSON Formatter & Validator
Validate, pretty-print or minify JSON.
Results are provided for general informational use. Verify important financial, health or legal figures before relying on them.
About this JSON Formatter & Validator
The JSON Formatter & Validator parses your input with the browser’s native JSON parser. Valid data can be pretty-printed with indentation for readability or minified to remove unnecessary whitespace; invalid input returns a parsing error.
For related tasks, try Base64 Encoder / Decoder, URL Encoder / Decoder or HTML Minifier.
How to use it
- Paste JSON into the editor.
- Choose Format for readable indentation or Minify for compact output.
- If parsing fails, use the error message to locate invalid syntax.
Practical example
The compact object {"a":1,"b":2} can be formatted onto multiple lines with indentation, while preserving the same data structure.
Frequently asked questions
Does formatting change JSON values?
No. It parses and serializes the same data structure, although insignificant whitespace changes.
Can it validate trailing commas?
Standard JSON does not allow trailing commas, so they produce an error.
Does the JSON get uploaded?
The formatter runs in the browser without an external API.
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