Strong Password Generator (Entropy Calculator)

Strong Password Generator (Entropy Calculator)

Local Processing

Generate high-security passwords with selectable character sets and real-time information entropy calculation in bits.

How It Works & Processing Standards

Generate high-security passwords with selectable character sets and real-time information entropy calculation in bits.

Tool processing runs in your browser. If you create a calculator or conversion share link, its values are included in the URL. See the privacy policy for account, analytics and advertising data.

Current Limits

  • Maximum input length: 100,000 characters

Choose password or PIN (digits) under "Task". Passwords use browser cryptographic randomness and show the character-set size and entropy so you can see how strong they are.

Passwords are not stored. Save it to your password manager before closing the page.

What You Can Do

Password
Makes a password from your character sets and computes entropy.
PIN
A numeric PIN of the length you choose.

How to Use Strong Password Generator (Entropy Calculator)

  1. 1
    Choose a taskPassword or PIN.
  2. 2
    Set length and charactersLength, character sets and count.
  3. 3
    Copy and saveSave it straight into your password manager.

Examples

16 characters, all four sets
Input: Length 16, lower, upper, digits, symbols
Result: e.g. 0fHOq!z0VV6(ADTp — set size 85, 102.6 bits of entropy (different every time)
6-digit PIN
Input: PIN, 6 digits
Result: e.g. 280416 (different every time)

Common Use Cases

  • Creating passwords for new accounts or Wi-Fi
  • Temporary PINs or lock codes

Frequently Asked Questions (FAQ)

How long should it be?

With all four sets, 16 characters give about 100 bits — plenty for ordinary accounts. If a site forbids symbols, make it longer.

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