Chmod Calculator
Calculate Linux/Unix file permissions visually. Convert between numeric (octal) and symbolic notation.
755
rwxr-xr-x
Read (4)
Write (2)
Execute (1)
Owner
Group
Other
$
chmod 755 filename
Convert
Common Permissions
777 (rwxrwxrwx)
Full access for everyone — use with caution
755 (rwxr-xr-x)
Owner full, others read+execute — standard for directories & scripts
644 (rw-r--r--)
Owner read+write, others read — standard for files
700 (rwx------)
Owner only — private directories
600 (rw-------)
Owner only — private files, SSH keys
444 (r--r--r--)
Read-only for everyone
666 (rw-rw-rw-)
Read+write for everyone, no execute
750 (rwxr-x---)
Owner full, group read+execute — shared project directories
About Chmod Calculator
The chmod command changes file permissions on Linux and Unix systems. Permissions are expressed in octal notation (three digits, 0-7) or symbolic notation (rwx for read/write/execute). Each digit represents permissions for owner, group, and others respectively.
Permission Values
- 4 — Read (r): view file contents or list directory
- 2 — Write (w): modify file or create/delete files in directory
- 1 — Execute (x): run file as program or access directory
Add the values together: rwx = 4+2+1 = 7, r-x = 4+0+1 = 5, r-- = 4+0+0 = 4