Free · Format and validate

JSON Formatter & Validator

Format, minify, sort, repair, and inspect JSON with clear line-and-column errors and a searchable tree view.

  • Instant results
  • Private in your browser
  • No signup or limits

Paste JSON. See what is wrong.

Results update as you type. Nothing leaves this tab.

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More options
Input1 lines
Result
{
  "client": {
    "name": "Maya Chen",
    "active": true
  },
  "appointments": [
    {
      "date": "2026-08-14",
      "minutes": 60
    }
  ],
  "version": 2
}
Valid JSONYes
Root typeObject
Top-level items3
Output size166 bytes

Three simple steps

How to use it

  1. Paste JSON or use the example, then choose Format, Minify, or Tree.
  2. If something is wrong, follow the highlighted line and plain-language error.
  3. Use More options to sort keys or accept comments and trailing commas.

Your data stays on this device

These tools run in your browser. Bookify does not upload, store, or inspect the values you enter. Close the tab and the working data is gone.