JWT Decoder
Security Local only
JSON Formatter & Validator
Local onlyFormat, minify, and validate JSON with useful error locations.
Ready Validated locally in real time
JSON input
JSONJSON
Paste JSON here…
Formatted output
Formatted JSON will appear here.
How to use it
- 01
Paste JSON
Add an object, array, string, number, or any other valid JSON value.
- 02
Choose an action
Format with two or four spaces, minify, or validate the original input.
- 03
Use the result
Copy the output or download it as a JSON file.
Frequently asked questions
Does Nobuf upload my JSON?
No. Parsing and formatting happen inside your browser.
Can it format JSON arrays and primitive values?
Yes. Any valid JSON value is supported, including arrays, strings, numbers, booleans, and null.
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Keep working with other private browser utilities.