Chmod Calculator

Calculate Unix file permissions with an interactive checkbox matrix. Get the chmod command.

Runs entirely in your browser — nothing is uploaded or stored on any server.

About Chmod Calculator

Updated Mar 2025

Visually set Unix/Linux file permissions for Owner, Group, and Other using checkboxes for Read, Write, and Execute. Instantly see the octal notation (e.g. 755), symbolic notation (e.g. rwxr-xr-x), and the chmod command to apply. Enter an octal value directly to see what permissions it represents. Common presets like 755, 644, and 600 are one click away.

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