Question 1

What does the chmod / Permission Calculator do?

Accepted Answer

It converts between octal (e.g. 755), symbolic (rwxr-xr-x) and chmod command form, with visual checkboxes for user, group and other permissions.

Question 2

Is it free?

Accepted Answer

Yes, free with no ads and no sign-up.

Question 3

Does it work offline?

Accepted Answer

Yes — once loaded, the calculator runs entirely in your browser.

	Read	Write	Execute	Special
User (owner)	r	w	x	setuid
Group	r	w	x	setgid
Others	r	w	x	sticky

chmod / Unix Permission Calculator

Permission grid