Generate a strong password
Cryptographically random passwords, created on your device and never sent anywhere.
How to generate a password
- 1
Pick your rules
Choose the length and which character sets to include.
- 2
Generate
A new password is created instantly from your browser’s cryptographic randomness.
- 3
Copy it
One click copies it to your clipboard, ready for Protect PDF or any account.
Why generate passwords on your device?
A password generator that runs on someone else's server asks you to trust that the password was not logged on the way to you. That is exactly backwards. Password generation needs no server at all: your browser ships a cryptographically secure random number generator, and PDFMergely simply uses it. Pair it with Protect PDF, which can fill in a generated password directly, or use it for any account that deserves better than a reused password.
Frequently asked questions
How random are these passwords?+
They come from your browser’s crypto.getRandomValues, the same cryptographically secure generator used for encryption keys, with unbiased sampling. They are not made from timestamps or Math.random.
Is the password stored or sent anywhere?+
No. It is generated in your browser’s memory, shown on screen, and exists nowhere else until you copy it. Nothing is logged and nothing leaves your device.
How long should a password be?+
For anything important, 16 characters or more. The default here is 20 characters with all character sets on, which is around 128 bits of entropy: far beyond brute force.
What are the look-alike characters it can exclude?+
Characters that are easy to confuse when read or written down: 0 and O, 1, l and I, and the | bar. Excluding them costs almost no strength and avoids typos.
Does it work offline?+
Yes. Once the page has loaded, generation is entirely local and needs no connection.