About This Tool
Understand and calculate Unix/Linux file permissions. Convert between octal notation (755), symbolic notation (rwxr-xr-x), and an interactive checkbox grid.
How to Use
- Enter an octal value (e.g., 755) OR use the checkboxes
- Changes in one format automatically update the others
- View the symbolic notation and chmod command
FAQ
What do the permission numbers mean?
4 = read, 2 = write, 1 = execute. Each digit represents owner, group, and others. So 755 = rwxr-xr-x (owner: full, group: read+exec, others: read+exec).
