Supercharge your PowerPoint productivity with
Supercharge your PPT Productivity with PPTools - Click here to learn more.

Proud member of


Image Export converts PowerPoint slides to high-quality images.

PPT2HTML exports HTML even from PowerPoint 2010 and 2013, gives you full control of PowerPoint HTML output, helps meet Section 508 accessibility requirements

Merge Excel data into PowerPoint presentations to create certificates, awards presentations, personalized presentations and more

Resize your presentations quickly and without distortion

Language Selector switches the text in your presentation from one language to another

FixLinks prevents broken links when you distribute PowerPoint presentations

Shape Styles brings styles to PowerPoint. Apply complex formatting with a single click.

Does this add-in have a digital signature?


You're trying to load an add-in and it appears to load, but nothing happens.

There are various reasons why an add-in might not load properly.

One possibility: your PowerPoint security settings require that all add-ins be digitally signed, but the add-in you're trying to use is not signed.

So how do you determine whether this is the problem or not? PowerPoint doesn't give you much help.


The trick is to peek inside the add-in itself.

Assuming the add-in is in the form of a PPAM file:


Then, either way:

Not seeing .PPTX or .ZIP or other file extensions?
Make Windows show file extensions and hidden files

Did this solve your problem? If so, please consider supporting the PPT FAQ with a small PayPal donation.
Page copy protected against web site content infringement by Copyscape Contents © 1995 - 2022 Stephen Rindsberg, Rindsberg Photography, Inc. and members of the MS PowerPoint MVP team. You may link to this page but any form of unauthorized reproduction of this page's contents is expressly forbidden.

Supercharge your PPT Productivity with PPTools

content authoring & site maintenance by
Friday, the automatic faq maker (logo)
Friday - The Automatic FAQ Maker

Does this add-in have a digital signature?
Last update 07 April, 2021
Created: 07 April, 2021