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security validator

Password Strength Checker

Score password strength with clear, local checks—length, variety, and guidance without sending data anywhere.

Results

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Strength
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Guidance
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How to use this validator

  1. Enter a test password (avoid real/production secrets).
  2. View the strength status and guidance.
  3. Adjust length/character mix to reach a strong rating.

Rules & checks

Scores length plus presence of lowercase, uppercase, digits, and symbols.

Flags weak passwords and provides guidance to improve.

Heuristic only—no breach list lookups; fully client-side/offline.

Inputs explained

  • Password

    Use a test or placeholder password. Do not paste production secrets. Longer is better; mix cases, digits, symbols.

When to use it

  • Help users build stronger passwords during sign-up or reset flows
  • QA password policies in staging without hitting backends
  • Educate users about length/variety impact

Common errors

  • Too short (under 12 chars)
  • Missing uppercase/lowercase/digits/symbols
  • Using common patterns like password123 or qwerty
  • Reused passwords across accounts

Limitations

  • Heuristic only—does not check breach databases or guessability models
  • Does not enforce site-specific rules (e.g., required symbols set)
  • Do not paste production credentials; use test strings

Tips

  • Aim for 12–16+ characters; longer passphrases beat short complex strings
  • Mix cases, numbers, and symbols; avoid dictionary words or dates
  • Use a password manager to generate and store unique passwords

Examples

Strong

  • S@mpl3Passw0rd! -> Strong (length + mixed sets)

Weak

  • password123 -> Weak (short, low variety)

Deep dive

This password strength checker scores length and character variety locally to help you build stronger passwords without uploading data.

Use it for quick guidance; rely on breach checks and password managers for real-world protection and rotation.

FAQs

Is my password uploaded or stored?
No. Everything runs in your browser and clears on refresh. Use test passwords only.
Is this a breach check?
No. It’s a heuristic score. Use a password manager and breach-check services for production credentials.
Does it enforce my app’s policy?
It scores general strength. Enforce site-specific rules server-side.

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