Is Chmod Calculator free?

Yes, Chmod Calculator is completely free to use with no signup required.

Does Chmod Calculator send my data to a server?

No. Chmod Calculator runs entirely in your browser using client-side JavaScript. Your data never leaves your device.

Calculate chmod octal and symbolic permission notation with checkboxes and common presets like 755 and 644.

DevTab

Never leaves your browser

Toggle permission checkboxes to get octal and symbolic notation, with common presets.