How do you remove numbering from headers when exporting from org-mode?

Solution 1:

Oleg's answer allows you to disable section numbering for all exports at all times. However if you only want to disable numbering on export for a single file you can use the following:

#+OPTIONS: num:nil

If you want to limit it to only a certain depth you can replace nil with an integer specifying up to which headline you want the numbers to appear. For example #+options: num:1 would turn your sample into:

1. Heading

   Sub-Heading

2. Another Heading

See Export Setting for the details and other export options that can be set on a per-file basis.
See HTML Specific Settings for HTML specific ones.

Solution 2:

You can customize the org-mode.

M-x customize-mode

org-mode

Then you choose Org Export/Org Export General/Org Export With Section Numbers

As an alternative put the following in your .emacs

(setq org-export-with-section-numbers nil)