Chmod Calculator

Calculate Unix file permissions with visual checkboxes and convert between numeric and symbolic notation.

Permissions

Owner7 = rwx
Group5 = r-x
Others5 = r-x
Numeric:755
Symbolic:rwxr-xr-x
Command:chmod 755 filename

Common Presets

Enter Numeric Value

Enter a 3-digit octal number (0-7)

Permission Reference

  • Read (r = 4): View file contents or list directory
  • Write (w = 2): Modify file or add/delete files in directory
  • Execute (x = 1): Run file as program or access directory