Submitting Assessments – file size limits

Student Guide: File size limits for common assessment tools and tools for compressing large files.

Assessment file size limits

Even if your file is within the file size limit, it may not upload due to issues with your internet connection. You are always advised to compress images and media content if they are part of your submission.


  • 100 mb with plagiarism checking.
  • 250 mb without plagiarism checking.


  • 100 mb.

Blackboard Assignment

  • 2560 mb.

How to compress files

Word and PowerPoint files

If a document is over the file size limit, then it might be possible to make the document smaller by compressing the images.  Microsoft has a guide on how to do this found here: Reduce image file sizes.

If you are submitting a PowerPoint presentation containing media content (audio and video), you can compress this by following these instructions: Compress your media files.

If you are working on a Mac, you will not have this option but you can save your presentation to your OneDrive and log into the Southampton Virtual Environment. When you are in SVE you will have the option to compress media files when you open your file in PowerPoint.

PDF files

Go to Adobe Acrobat Compress PDF. Upload your file and then download the compressed version. You do not need to sign in to or buy Adobe Acrobat to use this service.

Audio and video submission

We generally recommend using Panopto when submitting audio and video.

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