The dev toolkit that just works
Instant-access utilities for everyday programming and electronics tasks. Number converters, cryptography tools, string manipulators, electronics calculators — all free, all in your browser.
Everything you need, organised by category
6 categories. 40+ tools. All free.
String Tools
Case converter, Base64, URL encoder, find & replace, word counter and more.
Number Conversion
Convert between binary, octal, decimal, hex and ASCII in one step.
Cryptography
SHA hash generator, RSA key pairs, AES encryption and password generator.
Generators
UUID, QR codes, colour converter, CRON builder and timestamp converter.
Web & Dev
JSON formatter, JWT decoder, regex tester and HTML entity encoder.
Electronics
Ohm's law, voltage divider, resistor colour codes, LED calculator and more.
Why DevGizmo?
No sign-up required
Every tool works instantly in your browser. No account, no tracking, no friction.
Built for developers
Dark mode by default, keyboard-friendly, fast — designed for the way developers actually work.
Electronics included
Beyond the usual dev tools — Ohm's law, voltage dividers, resistor codes and PCB calculators in one place.
Always free
Supported by non-intrusive ads. The tools will always be free to use without paywalls.