Paste any JSON text into the box above and it's pretty-printed instantly. Click Minify to switch to a single-line, compressed output — further edits keep updating live in whichever mode is active. Switch the output to Tree view to explore nested objects and arrays with collapsible nodes — handy for large payloads. Turn on Sort keys to alphabetize object keys, and pick 2-space, 4-space, or tab indentation. If the JSON is invalid, an error message shows you what's wrong and where.
All tools / Formatting
JSON Formatter & Validator
Beautify, minify, and validate JSON instantly. Runs entirely in your browser — nothing you paste is uploaded.
Output
How this works & FAQ
Is my data uploaded anywhere?
No. All formatting happens locally in your browser using JavaScript. Nothing is sent to a server.
What's the difference between beautify and minify?
Beautify adds indentation and line breaks for readability. Minify removes all unnecessary whitespace to reduce file size.
What does Tree view show?
An interactive, collapsible view of your JSON's structure — click any object or array to expand or collapse it. Useful for quickly navigating deeply nested data without scrolling through raw text.
Why does it say my JSON is invalid?
Common causes: trailing commas, single quotes instead of double quotes, or missing brackets/braces. The error message includes what the parser hit.