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JSON Minifier — Free
Compress JSON into a single line by stripping every unnecessary space and line break — and see exactly how much smaller it gets. It validates first, all in your browser, nothing uploaded.
Open the tool — free → 🔒 Nothing uploaded · runs in your browserHow it works
- Open the tool on the Minify tab.
- Paste your formatted JSON into the input box.
- Click Minify to strip whitespace into one line.
- Check the size saved, then copy the result.
Why use Ajenza
- One-line output with all whitespace removed.
- Shows before → after size and percentage saved.
- Validates before minifying so you never ship broken JSON.
- Private — your JSON never leaves your device.
- Free, no sign-up, no watermark.
Frequently asked questions
How do I minify JSON online?
Open Ajenza JSON on the Minify tab, paste your JSON and click Minify. All unnecessary whitespace is removed and you get a single-line result, in your browser.
How much smaller does minifying make JSON?
It removes indentation and line breaks, which typically shrinks pretty-printed JSON noticeably. The tool shows the before and after size and the percentage saved.
Is my JSON uploaded?
No — minifying happens locally in your browser, so your data stays private.
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