File SIze In Articulate Storyline


I am wondering if there is a way of save and compacting the storyline file as it doesnt seem to correspond with the size of the file. For example I tried to delelete all slides in project to keep its setting etc before importing some slides ...and yet it is stil 7MB when empty.

Other files seem to creep up to 20MB and then others with sames slides in are under 3MB.

When it publishes it goes down to under a MB . I guess I am looking for a save and compact function?

Thanks in advance if you have a suggestion

58 Replies
Christine Hendrickson

Hi Fraser,

I totally agree with Vispi - that sounds really off.  I don't think you'll be able to attach a file that size to the forums, though.

Curious about the file itself. Are you working off of a network drive, or any other external source by any chance? If so, please try moving or saving the project to your local hard drive and see if that helps. 

  • Work on your local drive (your C: drive). Working on a network drive or a USB drive can cause erratic behavior, including file corruption, loss of audio, and other unexpected behavior. 
  • You should also make sure the directory path to your project files and your published output is less than 260 characters (for example C:\Articulate).
  • Avoid using special characters, accents or symbols in your file names (this includes spaces and underscores).

Additional information regarding "Naming Files, Paths, and Namespaces" in Windows operating systems can be found in the following Microsoft article.

If you are working locally and the file still seems excessively large, can you try recreating the issue while monitoring the file size of the project? For example, what's the file size showing for a brand new file, with no content (other than the default slide that's inserted)? How much does the size increase when you modify the background color? How much does it increase when you add the logo?


Trisha Johnson

Hi all,

I'm having the same problem. I want to save 10 slides from a previous course to use as a "template" but the file size remains the same size it was before I deleted the slides. We need to house this template in a file repository that has a 50 MB limit. Has anyone found a solution to this yet? I have installed the most recent update. 

Pierre Jouan

I too had a size issue : a theme where I deleted all images had no reason to weigth around 4MB.

I renamed it to .zip and was able to open an "assets" folder where images where still there, so I deleted the whole lot. Size went down to 200KB. Thanks for the trick Gerry !

This was just done to upload the theme here for testing purposes, I wouldn't risk using it on a project.

Weird though those files aren't purged sometime.

The zip trick doesn't work for .story file, BTW.

Phil Mayor said:

funny that you say that when you look at whop the dev team were

What do you mean ? Storyline developpers are former MM employees ? Flash devs maybe ??

Fraser M

I just upgraded to Storyline 2.  I'm working on a project with 7 HD videos in it and the Storyline file size is 2.4GB.  I wanted to reuse the template so I deleted the HD videos and saved it with just blank slides and it is still 2.4GB which is obviously very difficult to work with.  Any solution to this?

Ashley Terwilliger

Hi Fraser,

As Wendy mentioned you'll want to try importing it into a new project as described here. 

We have shared an issue with our QA team that editing or trimming a video causes the file size to increase. So I'll include this thread in the report filed with our team so that we can keep you posted on this particular issue. 

Linda Herring

Is there any way to reduce the published file size and still include html5 for mobile?

When I publish without html5, the zip file is 7K. With html5, it's 22K. 

The client is a large global company, and we are concerned about performance in remote areas and bandwidth.

There are no videos or narration. I've used minimal variables and layers. I do have animations.

The actual storyline file size is around 51K.

I'm using Storyline 2 Update 5.


Cal Osborne

OK - so I just had a 1.5 gig Storyline file, with about 40 slides, heaps of audio, video etc. 

I did a 'Save As', then deleted all scenes except 1, which just had a single audio file on it. When I resaved, the size of the audio file was still 1.5gig.

I then did the old trick of changing the file extension to .zip and unpacking the file. Guess what? All the video elements and audio files from the original file are still there in the saved version. 

This is a bug people. 

Ashley Terwilliger

Hi Cal,

You mentioned the size of the audio file was still 1.5 gig? I want to make sure you meant the .story file? Assets and elements are kept in the file if you were to delete them or similar until you save, close and reopen the project - this way if you needed to use the undo button you'd still be able to access them. As I mentioned above, there is a known issue with the trimming of videos and how that is doubling the project size, so we've reported that to our QA team for additional review and I don't currently have an update to share on that. 

As Wendy mentioned, going through the import method is also a good way to ensure extra slide masters, removed elements, etc. aren't transferred or lingering around the file. 

Alexander Reid

I have a 400 MB Storyline file; the bulk of it comes from videos.  I just finished substituting the videos for lower-quality versions to reduce the SCO package I upload to the LMS.  The Storyline file is now 510 MB.  The new 110 MB comes from the new videos I inserted, but it is clearly keeping the original versions in the Storyline package.

In Adobe Captivate, there is a function in the library called "Delete unused objects" which would normally fix this kind of problem.  Is there any similar function in Storyline?

PS: my SCO package is about 110 MB.  Regardless of any compression and additional encoding Storyline is doing, there is clearly a lot of unused garbage left in the Storyline file.

Pierre Jouan

I had this issue again today (Storyline 1, but same with SL2)

I took a project as a base for a new one, deleted every unneeded scenes and started making new slides.

Size was huge (35Mb) for just a bunch of slides.

I used the "import" trick and I could see (and import !) ALL scenes that were supposed to be erased! (some containing videos)

File size dropped to 3.4Mb afterwards.

A clean-up routine would be great when saving (or when "saving as" at least).


Pierre Jouan

Here's a side effect which I consider as a bug : I cannot delete unused Feedback Masters because SL thinks they still are in use : one of them is said to be used in 44 slides when my current project as only 1 quiz slide !

I then tried the import trick but it does not work because even with no quiz slide, two feedback Masters are in use by 1 slide.

I'll submit my file to the support...