Development · free tool

JSON formatter for API payloads, logs and configuration files

Format, indent and validate JSON, XML or SQL snippets for debugging and documentation. Your data stays in your browser whenever the task can be processed locally.

Use the tool Read the FAQ

Your tool

JSON Formatter

JSON, XML or SQL Format to process

Formatted result

Good to know

A JSON formatter indents and validates structured JSON so objects, arrays and fields are easier to read and debug.

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Understand

Understand JSON Formatter

What is JSON Formatter?

A JSON formatter indents and validates structured JSON so objects, arrays and fields are easier to read and debug.

Main use case: Format a raw JSON payload, validate syntax, inspect API responses or prepare readable configuration examples.

Common use cases

API response debugging: Indent compact payloads returned by APIs or webhooks.
Configuration review: Check JSON files before using them in apps or scripts.
Documentation: Prepare readable examples for technical docs.

How to use the tool

Paste raw JSON into the input.
Choose the format mode.
Check the status message for syntax errors.
Copy the formatted output.

Best practices

Use realistic test values when validating forms, exports or API payloads.
Keep real customer, banking and production secrets out of public tools.
Check the output format before copying it into a production workflow.
Document whether a value is generated, validated, converted or only estimated.

Common mistakes

Confusing valid format with real-world validity: A generated or locally validated value can match a format without proving that it exists in an official system.
Using real production data: Public utilities are best for test data, demos, fixtures, QA and quick checks, not for confidential values.

Frequently asked questions

What does a JSON formatter do?

It parses JSON and prints it with indentation so nested data becomes easier to read.

Can it fix invalid JSON?

It can show syntax errors, but you still need to correct invalid quotes, commas or brackets.

Is formatted JSON different from minified JSON?

The data is the same. Formatting only changes whitespace and line breaks.

Are my inputs sent to a server?

OnSubmit tools run in the browser whenever the task can be processed locally. Avoid pasting production secrets, real banking details or personal data into public tools.