Chmod Permission Calculator

What Is the Chmod Permission Calculator

The Chmod Permission Calculator converts Linux or Unix file permissions between octal values and rwxrwxrwx symbolic modes, then builds a ready-to-copy chmod command.

How to Use This Tool

1. In the permission matrix tab, toggle read, write, and execute for owner, group, and others.
2. Or switch to the octal tab and enter a three-digit value such as 644 or 755.
3. Review the octal result, symbolic mode, and full chmod command in the results area.
4. Update the target path if needed, then copy the command for terminal use.
5. You can also apply common presets to verify file or directory permission patterns quickly.

Key Features

• Live conversion between permission matrix and octal mode
• Real-time rwx symbolic output
• Ready-to-copy chmod command preview
• Common presets such as 644, 600, 755, 700, and 777
• Separate breakdown for owner, group, and others

Typical Use Cases

• Linux server file and directory permission checks
• Shell scripts and deployment command preparation
• Web directory, config file, and executable script reviews
• Ops troubleshooting, onboarding, and development debugging

Notes

Read=4, write=2, and execute=1. Add each group to get one octal digit, then combine the three digits into the final mode. Use high-permission values like 777 with caution.

Privacy and Data

This tool does not upload your path or permission data. All calculations run locally in your browser.