What does chmod 755 mean?

755 means owner has full permissions (rwx), group and others can read and execute (r-x). Common for directories and scripts.

What's the difference between octal and symbolic?

Octal uses numbers (755). Symbolic uses letters (rwxr-xr-x). Both represent the same permissions.

What are special permission bits?

SUID (4), SGID (2), and sticky bit (1) provide additional security controls beyond basic rwx permissions.

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Chmod Calculator

Calculate standard octal and symbolic file permissions

About Chmod Calculator

What is Chmod Calculator?

Calculate Unix/Linux file permissions in octal (755) or symbolic (rwxr-xr-x) notation. Use the visual checkbox editor or enter values directly. Essential for system administrators and developers working with Unix-like systems.

Features & Benefits

Visual permission checkbox editor
Convert octal to symbolic and back
Common permission presets
User, group, owner permissions
Special bits (SUID, SGID, sticky)
Copy chmod command ready to use

Frequently Asked Questions

What does chmod 755 mean?: 755 means owner has full permissions (rwx), group and others can read and execute (r-x). Common for directories and scripts.
What's the difference between octal and symbolic?: Octal uses numbers (755). Symbolic uses letters (rwxr-xr-x). Both represent the same permissions.
What are special permission bits?: SUID (4), SGID (2), and sticky bit (1) provide additional security controls beyond basic rwx permissions.