01
Paste your JSON
Add an object, array, string, number, boolean, or null value.
Developer Tools
JSON Formatter & Validator
Format, minify, sort, and validate JSON locally with clear syntax feedback.
0 characters
Output
Parsing and formatting happen locally. Avoid pasting secrets into any tool unless you understand how your device and browser handle clipboard data.
Data handling
Storage and export controls
- Retention
- The tool's working state is kept only while this page is open. Inputs and results are not saved to persistent storage by Got A Tool.
- Export
- The tool may prepare a result after you run it. It downloads or copies it only when you choose that action.
Advertising and analytics are separate site services. We do not send selected tool input to them. Read the Privacy Policy for details.
How it works
Clean up JSON in three steps
02
Choose the output
Format with spaces or tabs, minify the document, and optionally sort object keys.
03
Copy or download
Review syntax errors or export the valid result as formatted.json.
Clear and private
Readable JSON without a server round trip.
The browser parses and serializes your JSON locally. Invalid input produces a syntax message and location when the browser provides one.
Format or minify
Expand JSON for readability or remove unnecessary whitespace for compact transfer.
Recursive key sorting
Alphabetize keys inside nested objects while preserving the order of array items.
Safe output
Output is displayed as plain text and can be copied or downloaded only after successful validation.
Any JSON root
Objects, arrays, strings, numbers, booleans, and null are all valid JSON documents.
FAQ
Common questions
What does JSON formatting change?
Formatting changes whitespace and indentation, not the represented values. Enabling key sorting intentionally changes object-key order, which normally has no semantic meaning in JSON.
Does minifying JSON remove data?
No. It removes insignificant whitespace while retaining the parsed JSON values. The result may normalize number representation and escape sequences because it is serialized again.
Can duplicate object keys be detected?
Not reliably in this version. Standard JSON parsing keeps the last value for a repeated key, so avoid using duplicate keys when their distinction matters.
Is my JSON uploaded or stored?
No. Validation, formatting, sorting, and minification run locally in your browser. Got A Tool does not receive the JSON.
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