Password Strength Checker

Analyze your password's complexity, entropy, and resistance to brute-force attacks securely.

This tool has an API.Automate it from your code — 1 credit/call.Open in Playground

New here? Create a free account and call this tool from your code in minutes.

Input

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Output

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How to use Password Strength CheckerEvery option explained, a worked example, and what to check when the output looks wrong.Read the guide

Examples & Use Cases

Test Password

password123

Analysis Result

{ "score": "35/100", "strength": "Weak", "analysis": [ "Good length (>8).", "Missing uppercase letters.", "Contains lowercase letters.", "Contains numbers.", "Missing special characters." ] }

Password Strength Analyzer

Evaluating how resistant your password is to modern cracking techniques is essential for digital safety. Our Password Strength Checker scores your input based on length, character diversity, and structure, providing actionable feedback on how to improve its resilience against brute-force and dictionary attacks.

Why Length Matters More Than Complexity

While mixing symbols and numbers is good, raw password length provides exponentially more entropy. A 16-character password made entirely of lowercase letters takes significantly longer to crack than an 8-character password packed with obscure symbols. Our scoring algorithm prioritizes length as the primary factor of strength.

Privacy

Typing your real passwords into web pages is inherently dangerous. However, ToolsXpo operates entirely via client-side JavaScript. Your keystrokes and passwords are mathematically evaluated locally in your browser and are never transmitted, logged, or saved to any database.

How to use Password Strength Checker

Paste or type your input into the editor on the left.
Leave the defaults, or tweak them if the tool exposes options.
The result appears on the right as you type.
Copy the output or download it.

This tool runs in your browser. Your input is not uploaded or stored.

Use it from the API

Everything this page does is also available as a REST endpoint, so you can call Password Strength Checker from your own code, a script or a CI pipeline.


Bash
curl "https://api.toolsxpo.com/v1/password-strength-checker" \
  -H "Authorization: Bearer txp_live_YOUR_KEY"

The endpoint returns a JSON envelope ({ ok, data, meta }) and costs 1 credit per successful call. Try it in the playground or browse the full API reference.