JSON Formatter & Validator
Format, validate, and minify JSON in your browser. Find syntax errors, choose indentation, and copy clean output without uploading your data.
Waiting for JSON
0 characters
Formatted output
Formatted JSON will appear here
Paste JSON on the left to validate it and create clean, readable output.
Format and validate JSON instantly
Paste JSON to check its syntax as you type. Valid data is formatted with your chosen indentation and can be minified or copied. Invalid data shows a clear error with its line and column when available. Everything runs locally in your browser.
How to format JSON
- 1Paste or type JSON in the input editor.
- 2Review the validation status and correct any reported error.
- 3Choose an indentation style for the live formatted output, or select Minify.
- 4Copy the clean output for your code, API, or configuration file.
Validate JSON while you type
Format with 2 spaces, 4 spaces, or tabs
Minify and copy valid JSON in one click
Process data locally without uploading it
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JSON formatter questions
Is my JSON uploaded or stored?
- No. Formatting and validation happen in your browser. Your JSON is not sent to or stored on a server.
What does the JSON validator check?
- It uses the browser’s JSON parser to check object, array, string, number, boolean, and null syntax. Invalid commas, quotes, brackets, and other syntax errors are reported.
Can I minify JSON?
- Yes. Paste valid JSON and select Minify to remove unnecessary spaces and line breaks.
Which indentation styles are supported?
- You can format JSON with two spaces, four spaces, or tabs.
Can I format API responses and configuration files?
- Yes. Any valid JSON value can be formatted, including API responses, arrays, objects, and configuration data.