Free Online Chmod Calculator

Visually calculate and convert file permissions between octal and symbolic notation.

User (Owner)

Group

Other (Public)

Understanding Chmod and File Permissions

In Unix-like operating systems, chmod (change mode) is the command used to set file and directory permissions. These permissions control who can read, write to, or execute a file.

Why Use This Calculator?

This tool provides a simple, visual way to calculate the numeric (octal) and symbolic representations of file permissions. Instead of memorizing numbers, you can just check the boxes for the permissions you need, and the tool will instantly give you the correct chmod command value. It's perfect for developers, system administrators, and anyone working in a Unix/Linux environment.