Chmod Calculator

Work out chmod numbers like 755 and 644 by ticking read, write and execute for owner, group and others.

Tick the permissions you want and get the numeric mode for chmod.

Questions

What does 755 mean?

Owner can read, write and run; group and others can read and run. It’s the usual setting for folders and scripts.

And 644?

Owner can read and write; everyone else can only read. Typical for ordinary files.