Common mode
755 means owner can read/write/execute, group and others can read/execute.
Unix chmod Permissions Calculator
Convert Unix permissions between numeric modes such as 755, symbolic rwx notation, and visual owner/group/others checkboxes, including setuid, setgid, and sticky bits.
Runs locally in your browser. This tool does not upload your input.
Inputs
| Visual permissions | Read | Write | Execute |
|---|---|---|---|
| Owner | |||
| Group | |||
| Others |
Special bits
Special bits affect executable files and shared directories; this tool only explains the mode.
Results
- Numeric mode
- 755
- Symbolic mode
- rwxr-xr-x
Explanation
- OwnerRead, Write, Execute
- GroupRead, Execute
- OthersRead, Execute
Examples
How Unix chmod permissions work
Convert between numeric chmod modes, symbolic rwx notation, and visual checkboxes for owner, group, and others.
Permission digits
Each chmod digit is a sum: read is 4, write is 2, and execute is 1. A digit of 7 means read, write, and execute; 5 means read and execute.
Special bits
setuid, setgid, and sticky are represented by an optional leading octal digit and affect executable files or shared directories in specific Unix contexts.
No commands are run
The tool only converts and explains permissions. It never executes chmod or accesses your files.
Processing notes
All conversion happens locally in your browser.
FAQ
What does chmod 644 mean?
The owner can read and write, while group and others can only read.
What does chmod 755 mean?
The owner can read, write, and execute, while group and others can read and execute.
Does this change file permissions?
No. It only generates and explains permission modes.