Formatting runs entirely in your browser — nothing is uploaded.
Beautify and re-indent JSON5 online, free. JSON5 is a superset of JSON that allows comments, trailing commas and unquoted keys for human-edited config. This formatter re-indents minified or messy JSON5 with consistent spacing so it is readable and diff-friendly — processing runs in your browser with nothing uploaded.
It expands compressed JSON5 back into a clean, consistently indented form without changing its meaning. 100% free, no registration, and complete privacy — everything runs locally in your browser, so your data never touches a server.
Paste minified or messy JSON5 and get clean, indented output immediately — no upload wait.
Normalises spacing and nesting so the whole file follows one style, ideal before committing or reviewing.
Your JSON5 is formatted locally in JavaScript; nothing is logged, stored, or sent to a server.
Unlimited formatting with no account or quota, on desktop and mobile.
Paste your JSON5 into the input box and click Format. The formatter runs instantly in your browser and shows the result on the right — no upload, no signup, no installation.
Yes. The JSON5 formatter is completely free with no limits, no account, and no watermark. All processing happens locally in your browser for privacy.
No. Your JSON5 never leaves your device — it is processed locally in JavaScript. We don't upload, log, or store your input, so it's safe for proprietary code and config.
No. Formatting only adds indentation and line breaks for readability; it does not change the meaning or behaviour of your JSON5.
Yes. The tool is fully responsive and works on phones, tablets, and desktops — just open it in any modern browser.