About Chmod Permissions Calculator & Generator
Calculate and generate Linux/Unix file permissions with ease. Interactive checkboxes for Owner, Group, and Others generate 3-digit octal codes (e.g. 755, 644), symbolic strings (-rwxr-xr-x), SUID/SGID special bits, and ready-to-run bash chmod commands.
Key Capabilities & Features
- 3-Digit and 4-Digit octal calculation
- Symbolic notation (-rwxr-xr-x) generator
- Special flags: SetUID, SetGID, and Sticky Bit
- Quick presets (755, 644, 600, 700, 777)
- Ready-to-copy bash command
How to Use Chmod Permissions Calculator & Generator
1
Check Permissions
Toggle Read, Write, and Execute checkboxes for each group.
2
Inspect Octal
View the resulting octal number (e.g. 755 or 644).
3
Copy Command
Copy the generated chmod terminal command.
Privacy & In-Browser Execution Guarantee
Calculations run locally in your browser.
Frequently Asked Questions
What is the most secure permission for web files?
Generally 644 for public web assets and HTML, 755 for directories and executable scripts, and 600 or 400 for private keys and environment files.