Reducing Large Size of Published Files

Mar 19, 2014

Hello there,

We built a storyline project that is full of screen recordings.  Currently it is 190 MB.  Is there anyway we can reduce that?  We used the Step-by-Step approach so that we could modify the slides. 

I appreciate any suggestions.


9 Replies
Ashley Terwilliger-Pollard

Hi Kris,

The file size of your .story file will be compressed when you publish to a smaller amount, but if there are screen recording that you created in Storyline that you no longer need you can delete those from the "Record Screen" drop down arrow - and that will help reduce your file size. Additionally, if there are extra slide masters that you're not using I'd suggest removing those as well, and if there are any images that you'll be using throughout the course you can add those to a slide master instead of importing them into an individual slide each time. 

Kris Kern Stark

Hi Ashley,

Thank you for your response.  I have done all that you suggested.  I was able to remove a few recordings that the SME decided we did not need.  I am currently at 163 MB.  My folder of published files are 202 MB.  Does that sound correct?  We published for the Web and included HTML 5.



Shiv Naresh

Hi, I am facing a file size issue for the Storyline 3 output. My Project is having total 7 modules with separate assessment and the course is customized one. There are page level backgrounds and graphics. Also the Menu, Glossary, Help and Resource sections are customized, including the next and back buttons. The file size is going approx 30 MB for each module. The first module is 52 MB as it have one video. 

We have used the variables to control the Menu buttons which shows; Normal, current and visited status of each module. There are interactive slides in every module.

The knowledge check pages are having variables as there is requirement from client to restrict user. Like they cant reattempt the knowledge check page and it need to show the user selected options with tick and cross marks. We have used the survey templates and customized the design and functionality as per client requirement.

The problem is now the client requirement is to have all the modules as one course and the size is going more than 250 MB.

Can anyone help me on how we can reduce the final output size. Also what is the best way to use the background or images used in slides so that the size is reduced to maximum. Is it better to use the shapes instead of buttons for interactive slides and knowledge check pages like by converting  them into freefrom question?

Lauren Connelly

Hi Shiv!

I'm happy to help!

Here are a few ways to reduce the file size:

If you'd like us to take a look at the file, feel free to connect with our Support Team here.

Shiv Naresh

Hi Lauren,

Thanks for the quick response. Will check on the ways you have mentioned. Also can you reply on below question.

Also what is the best way to use the background or images used in slides so that the size is reduced to maximum. Is it better to use the shapes instead of buttons for interactive slides and knowledge check pages like by converting them into freefrom question?

For sharing the source file i need to check with client. Will update you on this.

Lauren Connelly

Hi Shiv!

Great questions!

We have documentation on best practices for high-quality images in Storyline 360! Here's the link. Most importantly, adjusting compression settings is how to keep the file size small. 

In regards to shapes and buttons, we recommend using what is best for your course because the file size isn't greatly impacted when choosing one or the other. 

Niyas N

Recently I published one course and it came around 918 MB as the final output size. I have gone through the folders and I found the js folder in html5 --> data has 900 MB. I don't know why it is coming like this. Is there any way to reduce the output size except the methods which are already mentioned above?

The storyline file has 208 slides and only 1 master slide. There is nothing is left unwanted in the storyline file. The course doesn't have video or audio. Even we haven't given any animation also. Only texts and Images are there in these 208 slides. Even though, the output is coming to almost 918 MB.

Please help me with this issue. I need to reduce it to almost 500 MB.

Joe Tansengco

Hi Niyas, 

Have you tried saving your project to a new project file to see if this helps reduce the total file size of the project? 

If that doesn't work, would you be willing to share a copy of your project file here or in private by opening a support case so I can take a look at why the file size of your course is so large? I'll delete it when I'm done troubleshooting!