JSON Formatter
Format, minify and validate JSON with precise error locations.
Processed privately on your device
Helpful guidance
Paste JSON, choose two- or four-space indentation, then format it for readable structure.
Minify removes insignificant whitespace, while Validate checks syntax without changing content.
When parsing fails, the browser message is paired with a calculated line and column to locate the problem.
Frequently asked questions
Does formatting change JSON values?
No. It parses the data and serializes the same values with readable indentation.
What does minify remove?
It removes spaces and line breaks that are not part of string values.
Why might an error message differ by browser?
JSON.parse supplies the core message, and JavaScript engines phrase syntax errors differently.
Is pasted JSON transmitted?
No. Parsing and formatting happen entirely in your browser.