Chmod Calculator
Toggle read/write/execute for owner, group, and others (plus setuid/setgid/sticky) to see octal and symbolic Unix modes instantly. Copy a ready chmod command without changing any files on your machine.
Runs entirely in your browser. Your data never leaves this device.
- Visual rwx toggles
- Octal output
- Symbolic mode
- chmod command copy
- Special bits
How it works
- Check read/write/execute for owner, group, and others (plus special bits).
- See octal (e.g. 755) and symbolic (e.g. u=rwx,g=rx,o=rx) forms update live.
- Copy the chmod command for your terminal.
Key features
- Visual rwx toggles
- Octal output
- Symbolic mode
- chmod command copy
- Special bits
FAQ
What is 755 vs 644?
755 is common for executables/dirs (rwxr-xr-x); 644 for files (rw-r--r--).
Sticky/setuid bits?
Optional special bits are included for advanced use — understand them before applying.
Does this change my files?
No — it only calculates commands. You run chmod locally.
Windows?
chmod applies on Unix-like systems and WSL; NTFS ACLs differ.
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