Linux Chmod Permission Calculator

This chmod calculator helps you determine the correct file permission values for Linux and Unix systems. Toggle checkboxes to set read, write, and execute permissions for owner, group, and others.

Instantly see both numeric (octal) notation like 755 and symbolic notation like rwxr-xr-x. You can also enter a numeric value to see which permissions it represents.

What does chmod 755 mean?

Chmod 755 gives the owner full read, write, and execute permissions, while group and others get read and execute only. This is the standard permission for web directories.

What is the difference between 644 and 755?

644 gives read/write to owner and read-only to others (typical for files), while 755 adds execute permission (typical for directories and scripts).