Unix Chmod Permission Calculator

Convert owner, group, and other read/write/execute permissions between three-digit octal and rwx notation.

Select permissions

Choose read, write, and execute permissions for the owner, group, and others. Octal and symbolic notation update immediately. All calculations happen in your browser.

Notation

Enter an octal value to update the checkboxes and symbolic notation above.

Octal

Symbolic

Generated automatically.

chmod command

chmod 755 file

Key features

Selects read (r), write (w), and execute (x) for owner, group, and other.
Synchronizes selections with three-digit octal such as 755 and symbols such as rwxr-xr-x.
Accepts octal digits 0–7 to update the permission switches in reverse.
Generates a copyable command example in the form chmod 755 file.

How to use

Toggle permissions for each class or enter three octal digits.
Review the symbolic permissions and generated chmod command.
Copy the value you need.

Examples

Check deployment permissions
Translate the required rwx combination for scripts and static files into values such as 755 or 644.
Build a chmod command
Select permissions with checkboxes and copy the generated chmod command.

Privacy

Permission-bit calculations and notation conversion run in your browser.

Requirements

Four-digit permissions with setuid, setgid, or sticky bits are not supported.

Common questions

What permissions does chmod 755 grant?: The owner gets read, write, and execute (rwx); the group and others get read and execute (r-x).
Can it calculate four-digit permissions?: No. It covers the basic owner, group, and other digits only; setuid, setgid, and sticky bits are not supported.