Input JSON
Parsed JSON
Parsed JSON will appear here...
Format, beautify, validate and explore JSON online. Paste messy or minified JSON and instantly get clean, indented, color-highlighted output with a collapsible tree view and inline error messages — all processed in your browser, nothing is uploaded.
Paste raw, escaped or minified JSON and the formatter pretty-prints it with consistent indentation so it is easy to read and diff. Use it as a JSON beautifier when an API returns a single unreadable line, or as a JSON parser to confirm a payload is structurally valid before you ship it.
The built-in JSON validator highlights syntax problems — trailing commas, unquoted keys, mismatched brackets — and points to where they occur, so you fix invalid JSON in seconds. Optional JSON Schema validation lets you check a document against an expected shape.
Large responses are easier to navigate as a tree. Collapse and expand nested objects and arrays, scan keys at a glance, and copy any branch. Everything runs client-side, so even sensitive JSON never leaves your machine.
Paste your JSON into the input box. The tool automatically parses it and shows beautified, indented output plus a tree view. If the JSON is invalid, you get an error message describing the problem.
Yes. It is completely free with no sign-up, and all formatting and validation happen locally in your browser. Your JSON is never sent to a server.
Yes. In addition to checking that JSON is syntactically valid, you can validate it against a JSON Schema to confirm required fields and types match what you expect.
Formatting (beautifying) adds indentation and line breaks to make JSON human-readable. Minifying removes whitespace to make it smaller for transport. Use the JSON Stringifier to produce compact strings.