Password generator
Generate strong, random passwords from your browser cryptographic generator, with the option to drop the look-alike characters l, 1, O and 0. Sixteen characters is a good target for an everyday password, twelve the floor and twenty for a master password, and a generator beats any phrase a human would pick. The passwords are minted on your device and never leave it.
- 100% local
- Free · no account
- Instant result
This tool runs entirely in your browser — nothing is sent to a server.
A strong password is long above all: each extra character multiplies the number of possible combinations. A random 16-character password mixing lowercase, uppercase, digits and symbols resists current brute-force attacks.
This generator relies on your browser’s cryptographic random generator (crypto.getRandomValues) and excludes ambiguous characters (l, 1, O, 0) to avoid transcription errors. Nothing is transmitted or stored.
How it works
Type the figures or drop the file you want to process — the tool checks them as you go.
Everything is computed directly in your browser. Nothing is sent to a server.
The result appears instantly, with the detailed breakdown ready to copy, download or keep.
Why use this tool
No account, no download, no limit: the result appears as soon as you enter your data.
Every rule, algorithm and check reflects what we use ourselves every day at Flexina.
The calculations follow the official standards, and the step-by-step detail lets you double-check the outcome.
What does running it locally bring you?
Files, figures and documents never leave your device: nothing is stored, nothing is sent.
Once the page is loaded, you can cut the network: the tool keeps working.
No upload, no account, no third-party server in between: results stay fast and fully private.
Frequently asked questions
What password length should I choose?
At least 12 characters, ideally 16 or more for sensitive accounts. For master passwords (password manager), aim for 20 characters or a passphrase.
Are the generated passwords stored anywhere?
No. They are generated in your browser and disappear as soon as you leave the page. Use a password manager to keep them.
Why use a different password per site?
If a site is compromised, a reused password gives access to all your other accounts (credential stuffing). A unique password limits the damage to a single service.