Data tool

JSON Formatter

Beautify and indent JSON so it is easy to read and debug.

Import fileIndent

Input

Output

Fast browser processing Private — no uploads Free to use

HOW IT WORKS

Use JSON Formatter in three simple steps

Paste or import a UTF-8 file up to 5 MB, or load an example.

Run the action below the editors. Review any error before continuing.

Use the current result. If you change the input or settings, process again first.

ABOUT THIS TOOL

Read API responses without changing large identifiers. Formatting changes whitespace, not the data model.

{"id":9007199254740993,"tags":["a","b"]}

{
  "id": 9007199254740993,
  "tags": [
    "a",
    "b"
  ]
}

No. Validation checks syntax, then formatting preserves numeric and string tokens exactly, including large integers and exponent notation.

FAQ

Will formatting change large IDs?

No. Validation checks syntax, then formatting preserves numeric and string tokens exactly, including large integers and exponent notation.

Can I choose indentation?

Yes. Choose two spaces, four spaces or tabs. Editing input or settings invalidates the previous result.

Is this tool free and private?

Yes. No account is needed, and your input is processed locally in your browser without being uploaded to FormatKit.