Password Strength Checker
Check password strength with 9 security rules. Estimates crack time using GPU brute-force speeds.
Advertisement
About Password Strength Checker Online
Check password strength against 9 security rules and estimate crack time assuming 10 billion guesses/second (modern GPU). All checking is client-side — your password is never transmitted.
Password Strength Checker Online is a free, browser-based utility that requires no login, no signup, and no installation. All processing happens entirely within your web browser using JavaScript — your data never leaves your device. The tool works on all screen sizes including mobile phones, tablets, and desktop computers.
How to use
- Enter your values in the input fields — results update instantly as you type.
- No submit button needed. The tool calculates in real time.
- Copy your result or share it via WhatsApp or Twitter using the buttons above.
- Use the workflow links below to chain into related tools for a complete task.
- All processing is browser-only. Nothing you enter is sent to any server.
Tool details
⚡ Next step — complete your workflow
Frequently asked questions
What makes a password strong?
16+ characters, mix of uppercase, lowercase, numbers, and symbols, no dictionary words, no keyboard patterns. A 16-char random password takes centuries to crack.
Is my password safe to type here?
Yes — all checking happens locally in your browser. Your password is never sent to any server. Check the network tab in DevTools to confirm.
Advertisement