Chmod-Calculator.app
Easily calculate and convert chmod permissions between Numeric (e.g. 777), Symbolic (e.g. +x), and RWX notations (e.g. rw-r--r--).
Chmod Calculator
Simple Chmod Calculator with intuitive checkbox on user, group and others
Check any permission box or input any Chmod options to get instant calculation results !
User (Owner) Permissions
Group Permissions
Others (Public) Permissions
Chmod Permissions Calculation Table
| r w x | |||
|---|---|---|---|
| 4 2 1 | |||
| Decimal | Calculation | Symbolic | Description |
| 0 | 0 + 0 + 0 | - - - | none |
| 1 | 0 + 0 + 1 | - - x | execute only |
| 2 | 0 + 2 + 0 | - w - | write only |
| 3 | 0 + 2 + 1 | - w x | write and execute |
| 4 | 4 + 0 + 0 | r - - | read only |
| 5 | 4 + 0 + 1 | r - x | read and execute |
| 6 | 4 + 2 + 0 | r w - | read and write |
| 7 | 4 + 2 + 1 | r w x | read, write, and execute |
Common Chmod Options
Understanding chmod 777
chmod 777 gives full read, write, and execute permissions to owner, group, and others. This means anyone can read, modify, and execute the file or access the directory. While it provides maximum accessibility, it's often considered unsafe for most files and should be used with extreme caution, especially on shared systems or servers, as it can pose significant security risks.