Paste JSON to format, beautify, and validate it instantly.
JSON is the standard data format used across nearly all modern APIs, configuration files, and web applications, but raw JSON data — especially when minified or returned by an API in a single unbroken line — is nearly impossible to read by eye. A JSON formatter adds proper indentation and line breaks to make the structure clear, and validates that the JSON is syntactically correct in the process.
Developers use this constantly when debugging API responses, inspecting configuration files, or troubleshooting a data structure that's throwing a parsing error somewhere in an application. Catching a missing comma or unclosed bracket manually in a wall of minified text is tedious; a formatter surfaces the problem immediately.
Paste your raw JSON into the input box, and the tool automatically formats it with proper indentation and line breaks. If the JSON contains a syntax error, the tool flags it so you can locate and fix the problem before using the data elsewhere.
The tool will indicate that the JSON is invalid, which usually points to a missing comma, an unclosed bracket or quote, or a trailing comma — common mistakes when writing or editing JSON by hand.
No — formatting only adjusts whitespace, indentation, and line breaks for readability. The underlying data values and structure remain exactly the same.
Formatting and minifying are inverse operations — this tool focuses on making JSON readable, which is the more common need when debugging or reviewing data.
No, the formatting and validation happen entirely in your browser, so your data isn't transmitted anywhere.
Readable formatting makes it much easier to spot structural issues, missing fields, or unexpected nesting, which are common sources of bugs when working with API data.