Struggling with Unix file permissions? Our chmod Calculator lets you set permissions visually with checkboxes and instantly see both numeric (755) and symbolic (rwxr-xr-x) notation.
How to Use
- Toggle permission checkboxes for Owner, Group, and Others
- See the numeric code update in real time (e.g., 755)
- View the symbolic notation (e.g., rwxr-xr-x)
- Copy the chmod command ready to use in your terminal
Common Use Cases
- Server setup: Set correct permissions on web server files
- Script permissions: Make scripts executable with the right permissions
- Security audits: Verify file permissions are properly restrictive
- Learning: Understand how Unix permission bits work
Frequently Asked Questions
What does 755 mean? Owner can read, write, and execute. Group and others can read and execute but not write.
What’s the most secure permission for config files? 600 (owner read/write only) is typical for sensitive configuration files.
Try our free Unix Permission Calculator now.
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