Developer Tools
Chmod Calculator
Calculate Unix file permissions with visual checkboxes
Permissions
| Read (r) | Write (w) | Execute (x) | Value | |
|---|---|---|---|---|
| Owner | 6 | |||
| Group | 4 | |||
| Others | 4 |
Special Permissions
Octal Input
Enter 3 or 4 digit octal value (e.g., 755 or 4755)
Result
rw-|rw-|rw-
Octal
644
Symbolic
rw-r--r--
chmod 644 filenamePresets & History
Permission Explanation
Read (r = 4)
View file contents or list directory contents
Write (w = 2)
Modify file contents or create/delete files in directory
Execute (x = 1)
Run file as program or enter directory
What is Chmod Calculator?
Calculate Unix file permissions with visual checkboxes
Chmod Calculator is a free online tool that works directly in your browser. No installation or signup required. All processing happens locally on your device, ensuring your data stays private and secure.
Why Use Chmod Calculator?
- ✓100% Free - No hidden costs or premium features
- ✓No Signup Required - Start using instantly without creating an account
- ✓Privacy First - All processing happens in your browser. Your data never leaves your device
- ✓Lightning Fast - Instant results with no server delays
How to Use
- Enter or paste your text in the input area above
- The tool will automatically process your input
- Copy the result or download it as a file
Features
- ✓Visual permission checkbox matrix
- ✓Octal and symbolic representation
- ✓Special permissions (SETUID, SETGID, Sticky)
- ✓Common permission presets
- ✓Permission history tracking
Frequently Asked Questions
What is chmod?
chmod is a Unix command that changes file permissions. It controls who can read, write, and execute files.
What do the numbers mean in chmod?
Each digit represents permissions for owner, group, and others. Values are: read=4, write=2, execute=1. Add them for combined permissions.