JSON Formatter & Validator
Runs locallyFormat, validate, beautify or minify JSON instantly — right in your browser.
Related tools
View all (10)Base64 Encoder / Decoder
Convert text to Base64 and back, with full Unicode support — all in your browser.
URL Encoder / Decoder
Encode and decode URLs and URI components safely — instantly, in your browser.
UUID Generator
Generate random v4 UUIDs in bulk — cryptographically random, right in your browser.
Unix Timestamp Converter
Convert Unix epoch timestamps to human-readable dates and back — with live current time.
HTML Entity Encoder / Decoder
Encode special characters to HTML entities and decode them back — safe for pasting code into pages.
Color Converter
Convert colors between HEX, RGB and HSL — with a visual picker and one-click copy.
Paste any JSON and get it formatted with your choice of indentation, minified for production, or validated with precise error positions. The parsing uses your browser's own JSON engine, so even sensitive payloads stay on your device.
Frequently asked questions
What formatting options are available?
You can pretty-print with 2 or 4 spaces, or minify everything onto a single line. The result updates instantly and shows a summary of the top-level structure.
What happens if my JSON has a syntax error?
The validator flags the JSON as invalid and pinpoints the error position, so you can jump straight to the missing comma or bracket instead of guessing.
Is my JSON uploaded anywhere?
No. Parsing uses your browser's built-in JSON engine, so even payloads containing API keys or personal data never leave your device.