JSON Formatter & Validator
Beautify, minify, and validate JSON instantly in your browser.
About This Tool
The JSON Formatter beautifies messy JSON with clean indentation, minifies it to a single compact line, and validates the syntax with a clear error message and position when something is wrong. It is useful for inspecting API responses, config files, and data payloads.
Parsing runs entirely in your browser using the native JSON engine, so even large payloads stay private and process instantly.
- check_circleBeautify JSON with 2-space indentation
- check_circleMinify JSON to a single line
- check_circleValidate syntax with error messages
- check_circleRuns in your browser, nothing uploaded
Frequently Asked Questions
What does beautify do? expand_more
It re-indents your JSON with line breaks and spacing so the structure is easy to read.
Why does it say my JSON is invalid? expand_more
The validator uses a strict JSON parser. Common issues are trailing commas, single quotes instead of double quotes, and missing brackets. The error message points to the problem.
Is my data safe? expand_more
Yes. JSON is parsed in your browser and is never uploaded to a server.