JSON Formatter
Format (pretty-print) or minify JSON and validate it — fast and private.
Minified or messy JSON is nearly impossible to read, and a single misplaced comma breaks it. JSON Formatter pretty-prints JSON with clean indentation, minifies it back down, and flags errors — so you can read, tidy and validate JSON in your browser.
How to use json formatter
- 1. Paste your JSON.
- 2. Format (pretty-print) or minify it; invalid JSON is flagged.
- 3. Copy the result.
When to use JSON Formatter
Read an API response
Pretty-print a wall of minified JSON into something you can actually read.
Find a syntax error
Validate JSON to catch the missing comma or bracket that's breaking it.
Minify for transport
Strip whitespace to shrink JSON before embedding or sending it.
Frequently asked questions
Does it tell me what's wrong with invalid JSON?
Yes — it flags that the JSON is invalid so you can locate and fix the problem.
Can it both format and minify?
Yes — pretty-print for reading, or minify to remove all whitespace.
Is my JSON uploaded?
No — it's parsed entirely in your browser, so sensitive data stays local.