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Tools · JSON formatter

JSON formatter

Indent, minify and validate your JSON. Everything happens in your browser: your content never leaves your device.

Processed on your device. Your files never leave it.

Format or compact your JSON and spot syntax errors, no software needed. Everything happens in your browser.

  • 100% client-side processing: your content stays private.
  • Readable indentation, minification, error checking.
  • Free, no sign-up, no ads.

See also

QR code generator
Create a QR code from text or a link.
CSV ⇄ JSON converter
Convert between CSV and JSON.
Color converter
Convert between HEX, RGB and HSL.
Generate an invoice
Create a PDF invoice online.

Frequently asked questions

How do I format and indent JSON?
Paste your JSON, the tool indents it cleanly and makes it readable. You can also minify it into a single line to make it lighter.
Does the tool flag JSON syntax errors?
Yes, if your JSON is invalid, the tool shows where the error is to help you fix it. Once valid, you can format it or minify it.
Is my JSON data sent to a server?
No, the formatting happens 100% in your browser. Your JSON data stays on your device and is never uploaded.
Is it free and account-free?
Yes, formatting and validating JSON is free, with no ads and no sign-up. You process your data with no limits.