Toggle read, write and execute for owner, group and others. The octal mode, symbolic string and chmod command update as you click. Everything runs locally in your browser.
| Bit | Owner | Group | Public |
|---|---|---|---|
| read | |||
| write | |||
| execute |
- octal
- 755
- symbolic
- rwxr-xr-x
Command
chmod 755 fileHow to use the chmod calculator
Check read, write and execute for the owner, group and others. Each role becomes one octal digit (read 4, write 2, execute 1), so 7 means all three and 0 means no access. The symbolic form and a copy-ready chmod command update as you click.
Octal and symbolic modes
Directories need execute permission to be entered, so 755 is the usual mode for web roots and 644 for regular files. Avoid 777: it lets any local user modify the file. Set the setuid, setgid and sticky bits deliberately, and remember that ACLs and SELinux labels can grant access that the mode bits do not show.