Chmod Calculator
Calculate Unix file permissions. Convert between numeric (octal) and symbolic chmod formats. Interactive permission selector.
How to Calculate Chmod Permissions
- 1 Select permissions for owner, group, and others
- 2 Check the read, write, and execute boxes as needed
- 3 View the octal and symbolic permission formats
- 4 Copy the chmod command to use in terminal
- 5 Use common permission presets for quick setup
Frequently Asked Questions
Is my code or data stored anywhere? ▼
No. All developer tools process data locally in your browser. Nothing is sent to any server or logged.
Can I use these tools offline? ▼
Yes! After the initial page load, most developer tools work without an internet connection.
Are there API limits? ▼
No limits. Since processing happens in your browser, you can use the tools as much as you need.
Is the output compatible with production use? ▼
Yes. Our tools produce standard-compliant output suitable for production environments.
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Last updated: January 15, 2026 · v2.1