chmod calculator

Tick read/write/execute for owner, group and other (plus setuid/setgid/sticky) and read off the octal and symbolic modes, or type an octal and see the boxes. Runs entirely in your browser.

read rwrite wexecute xOwner (u)Group (g)Other (o)

Special bits

Octal
Symbolic—
Equivalent command—

Tick the boxes or type the octal — both stay in sync. · Try:

What this shows

  • Octal and symbolic — both forms, kept in sync as you change either.
  • Special bits — setuid (4), setgid (2) and the sticky bit (1), and how they render as s/S and t/T.
  • The command — the exact chmod line for the mode you built.

Related reading: Linux permissions, and hardening a container.