JSON Formatter

Format, validate, and inspect JSON payloads without leaving the browser.

Indent size

Paste JSON

Ctrl+Enter to format

Formatted JSON

Your formatted JSON will appear here.

Step by step

How to use JSON Formatter

1
Paste a JSON object, array, API response, or configuration value into the editor.
2
Choose the indentation you prefer, then format the payload or switch to the tree view.
3
Review validation errors before copying the formatted JSON or inspecting nested values.

Capabilities

What this tool handles

Pretty-print with adjustable indentation
Inline validation errors for malformed payloads
Tree and raw text views for large objects

Common uses for JSON Formatter

Read minified REST or GraphQL responses during API debugging.
Check configuration and fixture files for syntax errors before committing them.

What to check before using the result

Formatting changes whitespace only. It cannot repair missing values or decide what an invalid payload was intended to contain.

Privacy and accuracy

Questions about JSON Formatter

Does this tool upload my input?

The conversion or analysis runs in your browser. The application does not intentionally send the value you enter to a processing API. Standard hosting infrastructure can still receive request metadata when the page loads; see the privacy page for details.

Can I rely on the output without checking it?

Use the result as a focused development aid and verify it in the system where it will be used. Test representative edge cases and confirm the destination uses the same format, standard, and assumptions described on this page.

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