Is Chmod Calculator free?

Yes, Chmod Calculator is completely free. No signup, no subscription, no hidden fees.

Is my data safe when using Chmod Calculator?

Absolutely. Chmod Calculator runs 100% in your browser. Your data never leaves your device.

No installation required. Chmod Calculator works directly in any modern web browser.

Math & Logic

Convert between symbolic (rwxrwxrwx) and numeric (755) Unix file permissions. Interactive checkboxes with common presets.

Numeric (Octal)

Common Presets

Numeric: 635 Symbolic: r----x-wx Command: chmod 635 <file> ls output: -r----x-wx