JSON Formatter 🔒 Your data never leaves your browser.

Format, validate and minify JSON with precise error location.

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About this tool

This JSON formatter pretty-prints, validates and minifies JSON data. When your JSON is invalid, it points to the exact line and column of the error instead of a vague "invalid" message — no more hunting for a trailing comma or missing bracket.

Parsing uses the browser's native JSON.parse, running 100% on your machine. API responses, configs and sensitive payloads are never uploaded anywhere.