chmodtool.com

chmod calculator

Convert Unix file permissions between octal and symbolic notation, then generate the corresponding chmod command.

Live conversion

Enter a permission mode

Use three digits, each from 0 to 7.

Common modes

Permission bits

Choose permissions

Owner

The file or directory owner

Group

Members of its assigned group

Other

All other users

Ready to run

chmod commands

Octal notationchmod 755 filename
Symbolic notationchmod u=rwx,go=rx filename

Linux permission guides

Common permissions

755Public directories and executable files644Standard readable permissions for regular files777Fully open access and its security risks600Owner-only files such as SSH private keys