JSON Formatter & Validator
Format, validate, and minify JSON with instant error hints. Built for API payloads, fixtures, and debugging malformed responses.
AI-Readable Summary
Format JSON, validate syntax, and pinpoint parse errors with line and column hints.
Paste JSON to validate it instantly. Common issues like trailing commas, comments, and unquoted keys are called out with precise hints.
Formatted output appears here
Paste JSON on the left to validate and format it
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What is this tool?
JSON Formatter & Validator helps developers format, validate, and minify JSON without leaving your browser. It is especially useful for inspecting API payloads, debugging malformed JSON, cleaning fixtures before commit.
How to use it
Example
{"status":"ok","count":42}{
"status": "ok",
"count": 42
}The formatter validates the payload and returns clean, readable JSON with stable indentation.
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Frequently Asked Questions
JSON Formatter & Validator helps developers format, validate, and minify JSON without leaving your browser. It is built for common workflows like inspecting API payloads and debugging malformed JSON.
Use it when you need a fast answer while debugging, building payloads, or validating output. Typical workflows include inspecting API payloads, debugging malformed JSON, cleaning fixtures before commit.
Yes. The tool is designed for fast, lightweight workflows without sign-up or heavy UI. Most processing happens instantly in the browser.