Gezidao

JSON Formatter

Beautify, validate and minify JSON with clear error messages.

Report an issue

Advertisement

AHow to use

  1. 01 Paste your JSON into the input box.
  2. 02 Click Format (2 or 4 spaces) or Minify.
  3. 03 If the JSON is broken, the error shows the line and column — fix it and retry.

QFAQ

Is my JSON sent to a server? ＋

No. Parsing and formatting happen entirely in your browser with the built-in JSON engine — nothing is uploaded.

The formatter says my JSON is invalid — why? ＋

The most common causes are trailing commas, single-quoted strings and JavaScript comments. JSON must use double quotes and no trailing commas. The error message points to the exact line.

→Related tools

→ JavaScript Formatter Format or minify JavaScript locally. → YAML to JSON Convert simple YAML key-value data to JSON. → YAML Formatter Format and validate common YAML syntax. → TOML Formatter Format and validate common TOML values.