Chmod Calculator
Chmod (change mode) is a Linux/Unix command to change the access permissions of files and directories. This free online calculator helps you calculate permissions using either numeric (octal) notation like 755 or symbolic notation like rwxr-xr-x. Use the visual permission grid to toggle read, write, and execute permissions for owner, group, and other users.
Owner
read
write
execute
Group
read
write
execute
Other
read
write
execute
Terminal Command
chmod 755 fileCommon Presets
Features
Grid
Visual Grid
Interactive permission matrix for owner, group, and other.
Calculator
Dual Output
See both numeric (755) and symbolic (rwxr-xr-x) notation.
Shield
Quick Presets
One-click access to common permission patterns.
Frequently Asked Questions
Tags
chmod
permissions
linux
unix
rwx
octal