Test the strength and security of your passwords. Get detailed feedback and recommendations.
Privacy & Security
All password analysis happens locally in your browser. Your password is never sent to any server or stored anywhere.
Evaluate password strength before you use it. Our checker analyzes length, character diversity, and common patterns—without sending your password to a server.
Password Strength Checker is designed for everyday tasks where speed and simplicity matter. Whether you are handling a single file or working through a batch, ConvertMastery keeps the workflow straightforward with clear settings and instant downloads.
Validate new passwords before saving. Educate teams on password policy. Compare passphrase vs short complex passwords. These are among the most common reasons users choose this tool on ConvertMastery.
For the best outcome, start with a high-quality source file when possible. If you are preparing images for the web, consider converting to WebP or compressing after conversion. For documents, review the output before deleting originals. When privacy matters, prefer settings that strip metadata and use browser-based processing when available.
ConvertMastery is updated regularly to support modern formats and browsers. If you need help, visit our documentation guide or browse related tools linked below. Processing is private and on-the-fly — results are not saved to our servers.
Any password string.
Analysis runs in your browser. Do not reuse real passwords on untrusted sites; use this tool to test patterns only.
No. Checking happens locally in your browser.