Linux & Unix Chmod Permissions Calculator
Free in-browser Linux & Unix Chmod Permissions Calculator. Configure read (r=4), write (w=2), and execute (x=1) permissions for Owner, Group, and Others alongside SUID, SGID, and Sticky Bit special flags. Automatically generates 3-digit octal codes (e.g. 755, 644, 600, 400), 4-digit octal codes, symbolic strings (-rwxr-xr-x), and copyable shell commands for single files and recursive directories.
Loading Chmod engine...
How to Calculate Chmod Permissions in 3 Steps
Check Permissions or Preset
Tick the Read, Write, and Execute checkboxes or choose a preset like 755 or 644.
Enter Target Filename
Optionally enter your script name or directory path.
Copy Octal or Chmod Command
Copy the octal number (e.g. 755) or complete chmod command with 1-click.
Frequently Asked Questions
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