JSON Formatter & Validator
Format, minify, and validate JSON data. Paste your JSON and choose an action.
Format, minify, and validate JSON in your browser. Beautify messy JSON with proper indentation, compress it to one line, or catch syntax errors instantly.
Free online JSON formatter, minifier, and validator. Instantly beautify JSON with 2 or 4 space indentation, compress to a single line, or check for syntax errors. Runs entirely in your browser.
Frequently asked questions
What does formatting JSON do?
It re-indents your JSON with consistent spacing and line breaks so it’s easy to read, without changing the data.
What does minifying do?
It strips all unnecessary whitespace to produce the smallest valid JSON, ideal for sending over the network.
How does validation help?
It checks the syntax and points out errors like missing commas or brackets, so you can fix malformed JSON quickly.
Is my JSON uploaded?
No — it’s processed entirely in your browser.