What is the Password Generator?
Generate strong, random passwords with a cryptographically secure generator. Everyday utilities for developers — encoders, formatters, hashes and generators — that run locally in your browser with standard Web APIs. No data is sent to any server.
How to use the Password Generator
- Enter your length, your how many.
- Tick the options you need: uppercase a–z, lowercase a–z, numbers 0–9, symbols !@#$…, avoid look-alikes (il1o0o).
- Press the Generate button — press it again for a fresh result.
- Read the output: passwords, entropy, strength, brute-force time (10b guesses/s).
- Use the 📊 chart to see the result visually, then copy or share it.
Formula and method
Tips for better results
- Hashes use the Web Crypto API and match command-line tools such as sha256sum.
- Never paste production secrets into any website — even client-side tools.
- Use JSON Validator before JSON Formatter to see precise error positions.
Frequently asked questions
What does the Password Generator do?
Generate strong, random passwords with a cryptographically secure generator.
How is it calculated?
The Password Generator uses this method: Entropy = length × log₂(pool size); characters drawn with crypto.getRandomValues.
Is the Password Generator accurate?
Yes. It uses standard formulas and exact constants, and the results are verified by our automated test suite. Values are displayed to up to 12 significant digits.
Is this tool free and private?
Yes — the Password Generator is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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