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JSON Formatter & Beautifier — Free
Turn minified or messy JSON into clean, readable, properly indented JSON — choose 2 spaces, 4 spaces or tabs. It validates as it formats, all in your browser, nothing uploaded.
Open the tool — free → 🔒 Nothing uploaded · runs in your browserHow it works
- Open the tool on the Format & Validate tab.
- Paste your JSON into the input box.
- Pick your indentation — 2 spaces, 4 spaces or tabs.
- Click Beautify to pretty-print it, then copy or download.
Why use Ajenza
- Pretty-print with 2 spaces, 4 spaces or tab indentation.
- Validates while it formats — errors show line & column.
- Sort keys alphabetically for clean diffs.
- Private — your JSON never leaves your device.
- Free, no sign-up, no watermark.
Frequently asked questions
How do I format or beautify JSON online?
Open Ajenza JSON, paste your JSON, pick 2 spaces, 4 spaces or tab indentation and click Beautify. It is pretty-printed and validated instantly, in your browser.
What indentation can I use?
You can pretty-print with 2 spaces, 4 spaces or tabs — pick whichever your project uses.
Is my JSON uploaded?
No — formatting happens locally in your browser, so your data stays private.
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