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JSON Formatter & Validator

Pretty-print, minify and validate JSON in your browser.
Free, no sign-up Runs instantly in your browser Nothing leaves your device For professionals, students

JSON Formatter & Validator

Instant

Guide

How to use the JSON Formatter & Validator

  1. 1

    Paste JSON.

  2. 2

    Choose format or minify.

  3. 3

    Copy the result; errors show the line and column.

Expert tip

What you should know

Common JSON errors are trailing commas, single quotes instead of double quotes and unquoted keys, which are valid in JavaScript but not in JSON.

FAQ

Frequently asked questions

Is my JSON uploaded?+

No. Formatting runs entirely in your browser.