Animation gif sizes

Jul 17, 2017

Hi all,

I wanted to utilise animated gifs I've made into sessions, problem is that Storyline (Storyline 2 for me) actually increases the file size of the gifs dramatically upon publishing. This makes them unsuitable for our web servers.

Are there any tips for preventing this? Also has this been fixed in Storyline 3?

Many thanks,


13 Replies
Chris Lee

Thanks for the reply Alyssa,

I have attached an image showing a test with a blank Storyline and a blank Storyline with simply the gif contained. You can see the file size variations below.

Gif sizing before and after

Our team have tested this a number of times, on a number of PCs, with a number of gifs, sadly all having similar file size issues. The way this is currently disables us from using animated GIFs in our sessions, which is a shame as we have 2D and 3D animation skills within our team not being utilised in our Storyline sessions.

I have also attached (zipped) these sessions I have mentioned, aka the blank session, the session with the GIF and the GIF stand alone.


Hope that helps, many thanks,


Alyssa Gomez

Hi Chris,

Thanks for sharing your GIF file. I did see an increase in file size, but not as much of an increase as you saw on your end. Here's what I found:

Storyline 2:

  • Empty file 803 KB, Empty file with GIF 2,591 KB
  • GIF Original size 383 KB, GIF size after publish 607 KB

Storyline 3:

  • Empty file 1,133 KB, Empty file with GIF 2,315 KB
  • GIF Original size 383 KB, GIF size after publish 607 KB


You're always welcome to download the Storyline 3 trial and take it for a test drive to compare published file sizes on your end!

Katie Riggio

Hi there, Ian. Happy to help you investigate!

This discussion is a bit older, so I'd like to start fresh to make sure you get the most up-to-date guidance:

  • What version of Storyline are you using?
  • We'd be happy to help test your file if you'd like us to compare the increased file size after publishing. You can share it privately with our Support team by clicking here!
Ian Monk

I actually worked things out on my end. The file size was so big because I was publishing to html5 with a flash fallback. The flash conversion was increasing my file size 2-3x. I was able to optimize the html5 output and avoid the flash publish, which got my file size down significantly. Thanks for checking in :)