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Unix permission helper

Chmod Calculator

Toggle permissions visually and get octal + symbolic modes instantly, with plain-language explanation for each position.

Numeric result

Symbolic result

chmod 755 <file>

u

Owner

Owner: read, write, execute

g

Group

Group: read, execute

o

Others

Others: read, execute

Special bits (optional)

Leading octal digit controls these: 4=setuid, 2=setgid, 1=sticky.

Position-by-position explanation

Pos 1

r

Owner Read

Pos 2

w

Owner Write

Pos 3

x

Owner Execute

Pos 4

r

Group Read

Pos 5

-

Group Write

Pos 6

x

Group Execute

Pos 7

r

Others Read

Pos 8

-

Others Write

Pos 9

x

Others Execute

755 = rwxr-xr-x