Free Online Utilities and Generators
QR codes, passwords, calculators, converters and generators for everyday jobs.
This is the drawer of small tools that solve a problem in ten seconds. Generating a QR code for a menu or a Wi-Fi network, creating a password that is actually strong, converting units, working out a percentage, or checking a hash. None of them need an account, and because they run in your browser the sensitive ones, particularly password and hash generation, never transmit anything.
What is in the utilities collection
- QR code and barcode generators, plus a scanner that reads them back.
- Password generators with adjustable length and character sets.
- Hash generators for checking file integrity.
- Everyday calculators for percentages, BMI, age, loans and GPA.
- Unit, currency-style and number-base converters.
- Colour pickers, palette extractors and format converters.
Why a locally generated password is safer
A password generator on a website that runs on a server is asking you to trust that the server does not log what it produced. When the generator runs in your browser it uses the Web Crypto API, the same cryptographically secure randomness that powers HTTPS, and the result exists only on your screen. Nothing is transmitted, so there is nothing to log. Combine a generated password with a password manager and you never need to remember or reuse one again.
Getting more out of QR codes
- Shorter content makes a simpler, more reliable code. Long URLs produce dense codes that scan poorly when printed small.
- Keep a clear white margin around the code. Scanners need that quiet zone to find the edges.
- Test the code with two different phones before printing a hundred copies.
- Dark code on a light background scans far more reliably than the reverse.
Frequently asked questions
Yes. They are produced with your browser's cryptographically secure random number generator and are never sent anywhere or stored.