Chmod Calculator
A free online chmod calculator for Linux and Unix. Toggle read, write, and execute permissions to generate octal, symbolic, and terminal command outputs, or type an octal number or permission string to decode it.
Visual Chmod Permission Calculator
Read
Write
Execute
Owner
Group
Others
Special
Presets
Octal
Symbolic
Command
chmod 644 file
Human
Owner can read and write. Group and others can read.
Both fields are editable. Type an octal like 750 or paste a permission string like -rwxr-x--- to decode it.
Others can write with this setting. World-writable permissions like 777 are a security risk on shared systems.
Apply to
Target (optional)