What is the Password Strength Checker?
Estimate password strength and entropy. The Password Strength Checker is a free online tool that works instantly in your browser — no installation, no signup and nothing to upload. It sits alongside other Cryptography tools on DevNibble such as Hash Generator, MD5 Hash Generator, CRC32 Checksum.
Runs entirely in your browser — nothing is sent anywhere.
How to use the Password Strength Checker
- Enter your values in the fields.
- The result is calculated instantly as you type.
- Copy the output.
Features
- Runs 100% in your browser — your data is never uploaded or stored.
- Free forever, with no account, no ads and no tracking.
- Copy or download your result in one click.
- Fast and responsive on desktop, tablet and mobile.
Frequently asked questions
Is the Password Strength Checker free to use?
Yes — Password Strength Checker is completely free with no sign-up, no ads and no limit on how many times you can use it.
Is my data private when I use the Password Strength Checker?
Everything happens locally in your browser. Your input is never sent to a server, which makes Password Strength Checker safe to use with private or sensitive data.
How do I use the Password Strength Checker?
Enter or paste your text and the result appears instantly. Copy or download it whenever you're ready.
Do I need to install anything to use the Password Strength Checker?
No installation and no account required — Password Strength Checker runs entirely in your web browser on desktop and mobile. Estimate password strength and entropy.