Free Security Tools
Free security tools to generate strong passwords, score password strength, hash text with MD5/SHA, decode JWTs, calculate chmod values, and clean tracking parameters from URLs.
Choose a tool and get an instant result
BlinkCalc tools are designed to be fast, practical, privacy-conscious, and easy to understand. Every result is calculated in your browser.
Password Generator
Generate strong, random passwords with custom length and character settings.
Password Strength Checker
Analyze any password: strength score, crack time estimate, and improvement tips.
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Frequently asked questions
Is it safe to check my password here?
Yes. The password strength checker runs locally. Your password is never transmitted, and we don't even store it in browser history.
How strong should a generated password be?
For most accounts, 16 characters with a mix of upper case, lower case, numbers, and symbols is plenty. For master passwords, 20+ characters is safer.
Can I rely on these tools for production secrets?
The generators use the browser's cryptographically secure random source (crypto.getRandomValues), so the entropy is suitable for production use.