JSON Formatter
Format, validate, and minify JSON locally in your browser.
Local developer tool
Paste JSON and clean it up.
Beautify nested objects, minify payloads, and validate JSON without uploading data to a server.
Input characters: 0
When should you format JSON?
Formatted JSON is easier to inspect, debug, review, and share with teammates. Minified JSON is useful when you need compact payloads for APIs, examples, or configuration files.
This tool validates strict JSON. It does not repair invalid JSON or accept JavaScript-style comments, trailing commas, or unquoted keys.
Frequently Asked Questions
Is this JSON Formatter free?
Yes. You can format, validate, minify, copy, and download JSON without signup.
Is my JSON uploaded?
No. Parsing and formatting run locally in your browser.
Does it support Unicode and emojis?
Yes. JSON.parse and JSON.stringify preserve valid Unicode strings and emojis.
Can it fix invalid JSON?
No. It validates strict JSON and shows an error so you can fix the source manually.
What indentation should I use?
Two spaces are common for web projects, four spaces are easier to read, and tabs are useful when your project requires them.
Privacy Policy
We do not collect, store, upload, or transmit the JSON you paste. Files opened through the picker are read locally in your browser.
Terms of Use
ConvertUnlimited is provided as is. Always review formatted JSON before using it in production systems.