Password Generator
Generate strong, random passwords with a cryptographically secure generator and a live strength meter.
Very strong · ~103 bits of entropy · crack time (offline attack estimate): 410,124,909,412 centurys
What is Password Generator?
A password generator produces high-entropy passwords by selecting characters uniformly at random from a chosen pool, typically using a cryptographically secure random source rather than a predictable pseudo-random one. The resulting password is as strong as its length and character variety allow, and because it is not based on a word or recognizable pattern it is far harder to crack than anything a person would invent. Generators let you control length and which character classes (uppercase, lowercase, digits, symbols) are included, so the output can satisfy the varying password policies of different services. Combined with a password manager, generated passwords give each account a unique and strong credential without requiring you to memorize any of them.
How to Use Password Generator
- Adjust the length slider to your desired password length (4-128 characters).
- Toggle which character types to include: uppercase, lowercase, numbers, and symbols.
- Optionally exclude ambiguous characters (like 0/O or l/1) if you'll be typing the password by hand.
- Click "Generate" for a new password, or "Copy" to copy it to your clipboard.
Examples
16 chars, all types
Input: length=16, all on
Output: aB3!kZ9$mQ2#vR7&
Numbers only
Input: length=8, numbers only
Output: 48291037
No ambiguous chars
Input: length=12, exclude ambiguous
Output: kR7mZ4pQxA9v
Common Mistakes
- Reusing the same generated password across multiple accounts — generate a unique one per account and store them in a password manager.
- Choosing a short length because it's easier to remember — a password manager makes memorability unnecessary, so favor maximum length instead.
- Disabling symbols/numbers because a site's password rules are unclear — most sites accept a full mix; only restrict character types if a site explicitly requires it.
- Writing the generated password down in plain text (e.g. a notes app) instead of a proper password manager.
Why Use This Tool
- Uses a cryptographically secure random source, not a predictable pseudo-random generator.
- Fully client-side — the generated password never leaves your device.
- Fine-grained control over length and character types to match any site's password policy.
- Built-in strength estimate so you can judge a password's quality before using it.