Chmod Calculator
Calculate Unix/Linux file permissions with a visual checkbox grid. See octal and symbolic notation in real time.
Chmod Calculator
Calculate Unix file permissions visually. Convert between octal and symbolic chmod notation. Free online tool.
Octal
755
=
Symbolic
rwxr-xr-x
| Read | Write | Execute | Octal | |
|---|---|---|---|---|
| Owner | 7 | |||
| Group | 5 | |||
| Others | 5 |
Common Presets
Command
chmod 755 filename
Frequently Asked Questions
What is chmod?+
chmod (change mode) is a Unix/Linux command that sets file permissions. It controls who can read, write, or execute a file. Permissions are set for three roles: owner, group, and others.
What do the numbers mean?+
Each digit represents permissions for owner, group, and others. Read=4, Write=2, Execute=1. They're added together: 7=rwx, 6=rw-, 5=r-x, 4=r--, etc.