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Chmod Calculator

Calculate Unix file permissions visually. Toggle read/write/execute for owner, group, and others to get the octal value and symbolic notation instantly.

owner
7
group
5
others
5
Octal
755
Symbolic
rwxr-xr-x
chmod 755 filename

Frequently Asked Questions

What is chmod?
chmod (change mode) is a Unix command that changes the access permissions of file system objects (files and directories).
What do r, w, x mean?
r = read (4), w = write (2), x = execute (1). These values are summed to produce the octal permission number for each category (owner, group, others).
What is symbolic notation?
Symbolic notation like rwxr-xr-- shows permissions as a 9-character string: first 3 for owner, next 3 for group, last 3 for others.

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How to Use

  1. 1 Toggle read (r), write (w), and execute (x) permissions for owner, group, and others.
  2. 2 View the octal value (e.g., 755) and symbolic notation (e.g., rwxr-xr-x) update in real time.
  3. 3 Copy the chmod command (e.g., `chmod 755 filename`) for use in your terminal.