Password Strength Checker
- ✓ At least 8 characters
- ✓ Contains uppercase letter
- ✓ Contains lowercase letter
- ✓ Contains number
- ✓ Contains special character (!@#$...)
Detailed Feedback
📦 Password Strength Checker Source Code $4.99
Get the complete, ready‑to‑deploy HTML file with all styling and logic. This is the exact code powering the demo above — no dependencies, fully offline, and 100% client‑side. Perfect for your portfolio, client projects, or resale. One-time purchase, lifetime access.
What is a Password Strength Checker?
A password strength checker evaluates the security of a password by analyzing its length, character variety, and common patterns. It helps users and developers understand whether a password is robust enough to resist guessing, brute‑force attacks, or dictionary hacks. The tool runs entirely in your browser, so no password is ever sent to a server or stored — keeping your credentials fully private.
How to Use
- Type or paste a password into the input field. You can toggle visibility with the eye icon.
- The checker instantly updates the strength bar and criteria list, showing whether the password meets length, uppercase, lowercase, number, and special character requirements.
- Review the detailed feedback on the right, which warns about common patterns like repeated characters, sequential digits, or dictionary‑based weaknesses. Use the copy button to save a strong password if you generate one elsewhere.
Frequently Asked Questions
Is my password safe? Does it get uploaded anywhere?
Absolutely. The checker works completely offline in your browser. Your password never leaves your device, and no data is stored, transmitted, or logged. You can safely check even sensitive passwords.
How accurate is the strength rating?
The tool uses a well‑established scoring algorithm that considers length, character diversity, and common patterns. While no checker can guarantee absolute security, this approach aligns with industry recommendations and helps you identify obvious weaknesses.
Does this tool work offline?
Yes, completely. There are no external libraries or server calls. Save the HTML file and you'll have a working password strength checker available anytime, even without an internet connection.
Disclaimer: This tool performs all operations locally in your browser. No data is stored, transmitted, or logged.