Password strength checker
Estimate password strength locally using length, character sets and common patterns. Review the score without sending the password to a server.
Features
- Report length and the number of character sets used.
- Flag a small set of common words and repeated patterns.
- Return a simple score from 0 to 4.
How to use this tool
- Enter the password in the password field.
- Run the strength check.
- Review the score and pattern indicators.
Good to know
This tool is free without sign-up, with unlimited processing and exports within the displayed input limits.
- This is a basic estimate, not a breach-database lookup or a guarantee of security.
Privacy and local processing
This tool processes your input in your browser. Source files and text are not uploaded to a FormatOwl processing server. Advanced-tool access and trial balances are checked online using tool IDs, file types, sizes and page counts. Free tools do not require account authorization. Save the results you need before leaving or refreshing the page.
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