Chmod calculator
Tick read/write/execute for owner, group and others to get the octal code.
Chmod calculator
Build Unix/Linux file permissions visually and get both the octal code (e.g. 755) and the symbolic string (e.g. rwxr-xr-x) for your chmod command. Tick read, write and execute for owner, group and others.
How the numbers work
Each permission has a value: read = 4, write = 2, execute = 1. Add them per group: rwx = 7, r-x = 5, r-- = 4. The three digits are owner, group, others — so 755 means owner rwx, group r-x, others r-x.
Common modes
- 644: files — owner read/write, others read.
- 755: scripts & folders — owner full, others read/execute.
- 600: private — owner read/write only.
Frequently asked questions
What does chmod 755 mean? Owner can read/write/execute; group and others can read/execute.
What is the difference between 644 and 755? 755 adds the execute bit, needed for folders and runnable scripts.