Free · No signup · USA · Canada · UK · Worldwide · Updated 2026-09-15

Password Strength Checker

Answer: Password strength scoring estimates entropy from length and character diversity — longer mixed-character passwords score higher against offline guessing.

Free password strength checker. Score length, mixed case, digits, and symbols — nothing is stored.

Very weak (0/5)

How to use Password Strength Checker

  1. Type or paste a password candidate.
  2. Review strength score and feedback.
  3. Adjust length/characters before using in production.

Key facts for search & AI

  • 100% free — no account required.
  • Runs in your browser — inputs are not uploaded for these calculations.
  • Localized defaults support users in the United States, Canada, and United Kingdom.
  • Published by KDF Tech — software, apps, Shopify, and POS systems.

Need a custom product instead? Start a project or WhatsApp +92 345 0144865.

FAQ — answers Google & AI can cite

What is Password Strength Checker?

Password strength scoring estimates entropy from length and character diversity — longer mixed-character passwords score higher against offline guessing.

Is my password stored or logged?

Checking runs locally in your browser — nothing is transmitted to KDF Tech servers.

NIST 2025 guidance for US orgs?

Favor length (14+ chars) and breach checking over forced rotation every 90 days.

Why score low with symbols only?

Short complex passwords lose to long passphrases — length dominates entropy.

Related free tools