Free Security Tools – Password Strength Checker & Password Generator
Password security starts with generating strong credentials and understanding what makes a password weak. The password generator creates custom strong credentials locally. The password strength checker tests any password locally against a 7-point checklist (length, character types and common passwords or patterns) and shows an estimated crack time.
Password Strength Checker
Check how strong your password is online free - nothing is saved or sent to any server. Get instant feedback from a 7-point length and character-variety checklist, plus an estimated crack time.
Password Generator
Generate strong, secure passwords instantly in your browser - custom length, uppercase, lowercase, numbers, and symbols. No signup required.
How to use these tools
Select the tool that matches your task, open it, and follow the steps below.
- Use the generator to create a new password, or the strength checker to test one you already have.
- For a new password, set the length and the character types, and optionally exclude look-alike characters; to check one, type it into the checker.
- Copy the generated password into your password manager, or read the checklist and crack-time estimate and strengthen the password if needed.
Common ways to use these tools
- Create a long random password for a new account, generated in your browser with the Web Crypto random source.
- Check whether a password is long enough, mixes character types and avoids common passwords or predictable patterns.
- Show someone why a short password is weak by comparing the estimated crack time of a short and a long password.
Credential Security & Privacy Testing Workflows
Protecting personal data across online platforms starts with strong, unique credentials:
- Creating cryptographically strong credentials: Generate unpredictable passwords featuring mixed character sets, numbers, and symbols using our Password Generator.
- Auditing password complexity and crack resistance: Test password candidates against standard entropy criteria and character-variety checklists using our client-side Password Strength Checker.
Client-Side Cryptographic Execution
Security utilities execute entirely in your local browser runtime. Passwords, generated phrases, and testing credentials never leave your machine and are never transmitted to external servers.