Compare Chmod Calculator with other tools. See why developers choose this free browser-based option.
100% free, no signup required. Works entirely in your browser.
Open Chmod CalculatorSet your desired options or enter data.
Results are generated instantly.
Copy the result or download.
Yes, the Chmod Calculator is completely free with no limitations. Calculate Unix file permissions using numeric (octal) or symbolic notation as many times as you need. No signup, no ads, and no premium features — everything is fully accessible to all users.
Yes, the Chmod Calculator works completely offline after the initial page load. Permission calculations are performed using simple JavaScript math operations with no server communication required. It is perfect for use in environments with restricted internet access.
All permission calculations happen locally in your browser. No file paths, permission values, or system information is ever transmitted to any external server. The calculator is a purely mathematical tool that requires no external data, ensuring complete privacy.
