JSON Formatter & Validator
Paste your JSON below to instantly format, minify, or validate it. Invalid JSON gets a clear error message with a best-effort line and column pointer.
How to use the JSON formatter
- Paste or type your raw JSON into the input box (or click "Load example" to try a sample).
- Click "Format / Beautify" to pretty-print it with 2-space indentation, or "Minify" to strip all whitespace.
- If your JSON is invalid, an error message appears showing what went wrong and, where possible, the line and column.
- Use the Copy button to grab the result, or Clear to start over.
Why use a JSON formatter?
JSON from APIs, logs, or config files often arrives as a single unreadable line, or with a subtle syntax error like a trailing comma or unquoted key. This tool re-indents valid JSON so it's easy to scan and debug, and minifies it back down when you need a compact payload for production. Because parsing happens with the browser's native JSON.parse, validation is accurate and instant — no server round trip, and your data never leaves your device. It's built for developers who just need to quickly check or reformat a JSON blob without opening a full IDE.
Does this JSON formatter validate my JSON?
Yes. When you click Format, the tool parses your input with JSON.parse. If it's invalid, you'll see a clear error message, often with the approximate line and column where the problem starts.
What's the difference between Format and Minify?
Format (beautify) re-indents your JSON with 2-space indentation so it's easy to read. Minify strips all unnecessary whitespace to produce the smallest possible output, useful for production payloads.
Is my JSON data uploaded anywhere?
No. Parsing and formatting happen entirely in your browser using JavaScript. Your data is never sent to a server.