Chmod Calculator
Free online Unix file permission calculator. Set permissions visually with checkboxes and see numeric (chmod) and symbolic formats instantly. 100% client-side.
Owner
Group
Others
Numeric
755
Symbolic
rwxr-xr-x
Binary
111 101 101
Quick Select
Shell Command
chmod 755 <file>Permission Reference
Read
Write
Execute
Owner
r = 4
w = 2
x = 1
Group
r = 4
w = 2
x = 1
Others
r = 4
w = 2
x = 1
Numeric = owner*100 + group*10 + others
Special bits: SUID (4), SGID (2), Sticky (1) — prepended as 4-digit
Symbolic shows s / t when special bits are set with execute, S / T without.