12+ Free Developer Tools
Tools that just work
A free, privacy-first toolkit for developers. No sign-up. No tracking. Everything runs in your browser.
Everything you need
Common developer tasks, solved in seconds
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JSON Formatter
Format, minify & validate JSON
B64
Base64
Encode & decode Base64
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URL Codec
URL encode & decode
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Regex Tester
Real-time regex matching
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SSL Checker
Certificate chain & expiry
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UUID Generator
Batch UUID v4 / v7
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Timestamp
Unix timestamp converter
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Password Gen
Secure password generator
WS
WebSocket Tester
Connect, send & receive online
Why Suzf?
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Privacy First
All tools run locally in your browser. No data is ever sent to our servers.
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Instant & Free
No sign-up, no limits, no cost. Open a tool and start working immediately.
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Multilingual
Available in English and Chinese. More languages coming soon.
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Works Everywhere
Fully responsive. Works on desktop, tablet, and mobile.