Free chmod CalculatorUnix/Linux file permissions — octal (755), symbolic mode, and ready-to-run chmod commands.
| Who | Read (r) | Write (w) | Execute (x) | Digit |
|---|---|---|---|---|
| Owner (u) | 7 | |||
| Group (g) | 5 | |||
| Others (o) | 5 |
Octal
755
Symbolic (ls -l)
-rwxr-xr-x
Command
chmod 755
What is a chmod calculator?
A chmod calculator converts between human-friendly permission checkboxes and the octal numbers used by the Unix chmod command. Each digit is the sum of read (4), write (2), and execute (1) for owner, group, and others.
Common modes
- 755 — directories and scripts you want others to run
- 644 — normal files
- 600 — private files (SSH keys, env files)
- 700 — private directories