Password Strength Checker
This check runs 100% on your device. The password you type is never sent to our servers, logged or stored. Use a password manager for real accounts.
About the Password Strength Checker
Test how strong a password really is: this checker estimates its entropy in bits and the time a modern cracking rig would need, entirely in your browser. The password you type is never sent anywhere, so test freely, then use a password manager to store the strong one.
How to use it
- 1 Type or paste the password to test.
- 2 Read the entropy estimate and crack-time guidance.
- 3 Lengthen it with more words until it reaches excellent, then save it in your manager.
Frequently asked questions
What makes a password strong?+
Length above all: a passphrase of four or five random words beats a short symbol puzzle. Uniqueness matters too: never reuse one across sites.
Is it safe to type my real password here?+
The check runs locally and nothing is transmitted, but good practice is to test a similar password, not the exact one you use.
How long should an Apple ID password be?+
At least 16 characters or a multi-word passphrase, with two-factor authentication on. Your Apple ID guards your photos, messages and payment methods.
