JSON Formatter
Validate, pretty-print, and minify JSON with a clear error message. Optionally sort keys. Works entirely in your browser.
JSON never leaves your browser — validation and formatting run locally.
About this tool
Beautify, minify, and validate JSON with clear error locations. Works instantly in your browser with no server round-trips, so your data stays private.
Reading and debugging raw JSON is painful without a formatter. This tool pretty-prints or minifies your JSON, highlights the structure, and pinpoints exactly where a validation error occurs. It runs client-side using your browser's native JSON parsing, keeping sensitive payloads private.
Why use it
Fast, precise JSON cleaning and validation with no uploads — a daily-essential for developers and API work.
How it works
- Paste your JSON.
- Format, minify, or validate as needed.
- Copy the cleaned output or fix any reported errors.
Frequently asked questions
Is my JSON uploaded?
No — formatting and validation run locally in your browser.
Does it show where errors are?
Yes, validation reports the location of any syntax error.
Can I minify JSON?
Yes, minify to remove whitespace, or beautify to add it back.
All processing on this page happens locally in your browser — your files are never uploaded to a server.
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