A fast, no-nonsense toolbox for everyday development tasks. Format JSON and HTML, test regular expressions, generate UUIDs, pick colors, create and scan QR codes, make barcodes, and more.
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Every tool runs entirely in your browser, so your code and data stay local and results appear instantly. There is nothing to install — bookmark the ones you use most and they work even offline once loaded.
Yes. Once the page has loaded, each tool runs fully in your browser and keeps working without an internet connection.
No. Everything is processed locally in your browser, so your input never leaves your device.
Yes. All developer tools are free with no sign-up, no limits, and no ads injected into your output.