Password Strength - Check Passwords Online

Check password strength and entropy

Password Strength Checker - Free Online Password Strength Checker

Free online password strength checker tool from Tan Phat Digital. Rate password security with a score of 0-100. Calculate entropy (randomness) and charset size. Estimating cracking time using brute force with modern GPUs. Detect common patterns that are easy to guess: 123456, password, qwerty, keyboard patterns. Checklist full of strong password criteria: length, uppercase letters, lowercase letters, numbers, special characters. Generate 16-character strong random passwords with one click. Processed 100% in the browser, the password never leaves your computer, absolutely secure.

Outstanding features

Evaluate password strength with a score of 0-100
Classification: Very weak, Weak, Moderate, Strong, Very strong
Calculate entropy (bits) - randomness of password
Calculate charset size - number of possible characters
Estimated crack time with 10 billion guesses/second
Time display: seconds, minutes, hours, days, years, centuries
Detect common patterns: 123456, password, qwerty
Detect keyboard patterns: qwerty, asdf, zxcv
Detect repeated characters: aaa, 111
Detect sequential: abc, 123
Checklist of strong password criteria
Check: length, uppercase, lowercase, numbers, special characters
Generate a strong random password of 16 characters
Offline processing - password not sent to server
Completely free, unlimited

Why is it necessary to check and use strong passwords?

Weak passwords are the leading cause of account and data breaches. According to Verizon Data Breach Report, 81% of hacks involve weak or stolen passwords. Common passwords like

Benefits when used

  • •Know exactly how strong or weak your password is
  • •Understand why passwords are weak with a detailed checklist
  • •Know how long it takes a hacker to crack a password
  • •Detect predictable patterns that you don't recognize
  • •Generate random strong passwords quickly
  • •Absolute security - password does not leave the browser
  • •Password security education
  • •Free and unlimited use

How to check password strength

  1. 1Enter the password to check in the input box
  2. 2View score (0-100) and colored progress bar
  3. 3Read the classification: Very weak (red) → Very strong (green)
  4. 4See Entropy and Charset size in the Analysis section
  5. 5See estimated crack time
  6. 6Check Checklist - green tick means pass, white circle means fail
  7. 7If there is a common pattern warning, change your password immediately
  8. 8Or click the random password generator button to have a strong password
  9. 9Copy the new password and save it to the password manager

Cooperate immediately with Mavis Digital

We not only design websites, but also help businesses build strong digital brands. Providing comprehensive website design services from design to SEO optimization. Please contact Mavis Digital immediately to create breakthrough, effective and sustainable technology solutions for your business in Ho Chi Minh.

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