Linux Chmod Calculator
Calculate Unix file permissions in numeric and symbolic notation. Free, fast, and runs 100% in your browser.
File permissions on Linux servers are the first line of defense against unauthorized access. This interactive calculator converts between numeric (755) and symbolic (rwxr-xr-x) notation with click-to-toggle checkboxes. See the chmod command update in real time as you set permissions for owner, group, and others.
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Chmod Calculator
Calculate Unix/Linux file permissions in numeric and symbolic notation.
7
rwx
5
r-x
5
r-x
755
-rwxr-xr-x
chmod 755 <file>chmod u=rwx,g=rx,o=rx <file>Feature Overview
| Feature | Details |
|---|---|
| Numeric notation | ✓ |
| Symbolic notation | ✓ |
| Interactive toggles | ✓ |
| Command output | ✓ |
| Privacy | 100% client-side |
Frequently Asked Questions
What does 755 mean?
Owner gets read+write+execute (7), group gets read+execute (5), others get read+execute (5). The standard for web directories.
What should SSH key permissions be?
600 (owner read+write only). SSH will refuse to use keys with broader permissions.
What is the sticky bit?
The sticky bit (chmod 1xxx) on directories means only file owners can delete their own files — used on /tmp.