Free tools that run in your browser
76 utilities for passwords, random numbers and QR codes. Everything is computed on your device — nothing is uploaded, and no account is needed.
Quick password
Three groups of tools
Each one is a full tool, not a signup funnel. Pick a group to see everything in it.
22 tools Passwords Generators for passwords, passphrases and usernames, plus tools to measure how strong one actually is. Everything is generated locally with the Web Crypto API. Password generator · Random password · Strong password 32 tools Random numbers Numbers in any range, dice, pickers and wheels. Uniform selection from a cryptographic source, with no-repeats sampling when the draw must be unique. Random number · Number generator · RNG 22 tools QR codes Scan with a camera or decode an image in the browser. Codes are read on your device — no upload, and no automatic redirect to whatever they contain. QR scanner · Scan online · Online QR
Most used
The tools people come back to.
Password Generator Create a random password with the length and character sets you need. Everything runs locally. Random Password Generator A password built from a cryptographic random source, character by character. Strong Password Generator Starts at 16 characters with every character class on. The baseline we would use ourselves. Passphrase Generator Words instead of symbols, because you might actually have to type this one. Random Number Generator Any range, any count, uniform distribution. Both ends included. Random Picker Paste your list, one item per line, and draw a winner. Dice Roller Roll one or several dice, with the total. d4 through d100. QR Code Scanner Scan with your camera, or drop in a screenshot. Images never leave your device.
Why these tools behave differently
- Nothing is uploaded. Passwords are built with crypto.getRandomValues(), QR codes are decoded in the page, and no request carries your input to a server.
- Correct randomness, not just random-looking. Character selection uses rejection sampling, so no value is favoured by a modulo remainder.
- No account, no usage limit. There is nothing to sign up for and nothing to upgrade.
- Honest about limits. Where a tool cannot do something — a browser cannot join a Wi-Fi network from a code, for instance — the page says so instead of pretending.
Passwords
Generators for passwords, passphrases and usernames, plus tools to measure how strong one actually is. Everything is generated locally with the Web Crypto API.
Password Generator Create a random password with the length and character sets you need. Everything runs locally. Random Password Generator A password built from a cryptographic random source, character by character. Strong Password Generator Starts at 16 characters with every character class on. The baseline we would use ourselves. Secure Password Generator The same generator with the security model written out, because that is what this search is really asking. Password Maker Make a password and take it with you in one click. Random Password Maker One click, one random password. No settings required unless you want them.
All 22 Passwords tools → · How long does it take to crack a password? · What actually makes a password strong
Random numbers
Numbers in any range, dice, pickers and wheels. Uniform selection from a cryptographic source, with no-repeats sampling when the draw must be unique.
Random Number Generator Any range, any count, uniform distribution. Both ends included. Number Generator Same engine as the random number generator, with the bounds front and centre. RNG — Random Number Generator The three-letter version: a random number, right now. Random Picker Paste your list, one item per line, and draw a winner. Wheel Picker A spinning wheel for names and options, with a result you can show to a room. Random Draw Sequential draws for multiple prizes, without the re-roll problem.
All 32 Random numbers tools → · How random number generators actually work · What people actually use random numbers for
QR codes
Scan with a camera or decode an image in the browser. Codes are read on your device — no upload, and no automatic redirect to whatever they contain.
QR Code Scanner Scan with your camera, or drop in a screenshot. Images never leave your device. QR Code Scanner Online No app, no installer, no account — just the page. Online QR Scanner The lightest version of the scanner: open, scan, done. QR Code Reader Reader for the cases where the code is a file, not something in front of you. QR Code Reader Online Upload, drag, or paste a screenshot — three ways to get the image in. Online QR Reader No install, no account: an online reader for codes you already have.
All 22 QR codes tools → · Why won't my QR code scan? · How to scan a QR code on an iPhone
Guides
Background reading for the questions the tools do not answer.
How long does it take to crack a password? The answer depends almost entirely on two things: how the password is stored, and how long it is. What actually makes a password strong Four properties matter. Most of the advice people repeat is about the least important one. Password generator vs password manager: which do you need? They solve different halves of the same problem, and using one without the other barely helps. Why won't my QR code scan? Almost every failed scan comes down to one of eight causes. Here is how to tell which. How to scan a QR code on an iPhone The Camera app does it natively. The interesting case is a code that exists as a photo. How to scan a QR code on an Android phone Android has three built-in scanners. None of them reads an image from your gallery.