Password Generator & Strength Checker
Checked and verified · August 15, 2026
Generate a strong, random password with full control over length and character types, or paste in a password you already have to see how strong it really is. Runs entirely in your browser — nothing is uploaded.
Length
Include
For any feedback, bug report and request:
Contact UsHow it works
- Pick a mode: Generate or Check Strength.
- Generate: set a length and pick which character types to include (uppercase, lowercase, numbers, symbols), then click Generate — the password is created using your browser's cryptographically secure random number generator, not a predictable one.
- Every selected character type is guaranteed to appear at least once, and you can optionally exclude visually ambiguous characters like l, 1, I, O, and 0.
- Check Strength: paste in any password to see a live strength meter, an estimated time to crack, and which criteria it does or doesn't meet.
- Click "Copy" to copy a generated password straight to your clipboard.
Frequently asked questions
Is this actually secure, or just for show?
Generated passwords use window.crypto.getRandomValues() — the same cryptographically secure randomness browsers use for real security features — not Math.random(), which is not safe for generating secrets. Nothing is ever sent to a server; everything happens locally in your browser.
Does it store or transmit the passwords I generate or check?
No — nothing is saved, logged, or sent anywhere. Once you leave or refresh the page, it's gone.
How is the strength/crack-time estimate calculated?
From the password's entropy (length × the number of possible characters per position), converted into an estimated number of guesses and a rough crack-time assuming a fast offline guessing attack. It also flags a shortlist of extremely common passwords outright, since those are cracked instantly regardless of length.
Can I guarantee my password includes at least one number or symbol?
Yes — every character type you enable in Generate mode is guaranteed to appear at least once in the result, not just left to chance.
What does "exclude ambiguous characters" do?
It removes characters that are easy to misread or mistype, like a lowercase l, uppercase I, and the digit 1, or uppercase O and the digit 0 — useful for passwords you'll need to type by hand or read off a screen.
Your files are never uploaded. Gotool.xyz runs entirely as JavaScript in your browser. Your files are processed in memory and never touch a server — nothing to breach, nothing to clean up. Close the tab and it's like it never happened. The only thing we count is which tool ran (just the name, e.g. "merge") so we know what people find useful — never your file, its name, its size, or anything in it.
