Home
Tom Utilities

JSON Formatter

JSON Tools

Beautify and validate JSON with configurable indentation, error highlighting and one click copy.

Input

Result

How to use

How to format JSON

Paste or type JSON on the left, then press Format. Everything is processed locally in your browser.

  1. Paste your JSON into the input editor.
  2. Choose the indentation you prefer.
  3. Press Format and copy the result.

Frequently asked questions

Is my JSON uploaded to a server?

No. Formatting runs entirely in your browser with JavaScript, so your data never leaves your device.

Can it detect syntax errors?

Yes. If the JSON is invalid the tool shows the error and the position where parsing failed.

Related tools

JSON Validator Check whether your JSON is valid and see a clear explanation of any syntax problem. JSON Minifier Remove every unnecessary space and newline to produce the smallest possible JSON payload. JSON Tree Viewer Turn JSON into an interactive, collapsible tree with array lengths and value types. JSON Compare Compare two JSON documents and highlight added, removed and changed values. JSON Viewer Read JSON in a clean formatted view and explore it as a collapsible tree. JSON Editor Edit JSON with line numbers, bracket matching, code folding and live validation.