JSON Formatter
Beautify, minify and validate JSON — entirely in your browser.
Format, beautify, minify and validate JSON for free. Everything runs entirely in your browser — your files are never uploaded to a server, so your data stays private on your device.
Making sense of dense JSON
JSON returned by an API, logged by a server, or pasted from a config file often arrives as a single, tightly packed line that’s nearly impossible to read by eye. Beautifying it adds the indentation and line breaks that reveal its actual structure — which fields are nested inside which objects, where arrays start and end — turning a wall of text into something you can actually scan and understand at a glance.
Validating, and going the other direction
Hand-edited JSON is an easy place to introduce a small but fatal mistake — a missing comma, an extra brace, an unquoted key — and most environments will only tell you "invalid JSON" without saying where. The formatter checks the structure as you go and flags problems so you can find and fix them quickly. When you’re done shaping the data, you can also flip the process around and minify it back into a single compact line, ideal for shipping inside a config file or an API payload where every byte counts.
How to use json formatter
- Paste your JSON.
- Beautify, minify, or validate it.
- Copy the result.
Frequently asked questions
Does it validate JSON?
Yes — invalid JSON is flagged so you can fix syntax errors quickly.
Is my JSON sent anywhere?
No. Formatting happens entirely in your browser.
Can it minify as well as beautify?
Yes — switch between pretty-printed and minified output.