My customers can’t download a purchased product (digital file pdf 1GB) on their phones?

Shopify Discussion
1

For some reason people who purchase my digital GUIDE PDF file 1GB 175 pages, can download it on their laptops or computers, but not on their cell phones they keep getting errors. Can anybody please help me?

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Hello @Homemadegarden

Mobile devices often struggle with huge PDF files—your 1 GB, 175-page guide can exceed memory limits or timeout during download, and many mobile PDF viewers choke on oversized documents. Here’s how to fix this:

1. Optimize the PDF

  • Run your file through a compressor (Adobe Acrobat’s “Reduce File Size” or a tool like Smallpdf) to bring it under 50 MB.
  • If you need full-resolution images, consider splitting the guide into smaller volumes (e.g., Part 1: pages 1–60, Part 2: pages 61–120, Part 3: pages 121–175).

2. Switch to a mobile-friendly delivery method

Host the PDF on a fast CDN or in Shopify Files—this reduces download errors.

Enable “streaming” by embedding it in a viewer app (e.g., PDF Viewer Apps on Shopify) so phones load pages on demand instead of grabbing the whole file at once.

3. Test across devices

  • After optimization, download each split or compressed version on iOS and Android to confirm it opens without errors.
  • If a specific viewer still fails, recommend a lightweight PDF app (Adobe Reader, Google PDF Viewer) in your delivery email.
3

Hi @Homemadegarden ,

My name is Léo and I built an called Big Digital Download to help merchants like you :blush:

The reason your customers can download the file on their laptop but not on their phone is probably due to three main things:

  1. Mobile browsers are much less robust than desktops when it comes to downloading large files. If the connection drops even for a second, the download often fails completely.
    Also, when your customers try to open a 1GB PDF directly in the mobile browser, it’s not actually downloaded first, it’s streamed, which means the phone tries to load the whole file into RAM. This often causes the browser (or even the phone) to crash, especially if the device is not very powerful.

  2. 1GB for a PDF is way too much, even if it’s 175 pages. I strongly recommend:

    • Compressing it using ilovepdf.com

    • Splitting it into smaller parts (e.g., “Guide - Part 1”, “Part 2”… under 100MB each ideally)

  3. Consider offering two versions of the download:

    • One as a normal PDF (for computers or strong connections)

    • One as a ZIP file, so it gets saved directly on the phone, rather than streamed. This greatly reduces crashes and makes it easier for users to open it with a proper PDF reader app.

If you want help compressing or splitting the file, feel free to ping me on the live chat inside the Big Digital Download app. I’ll be glad to help and walk you through the process step bystep :raising_hands:

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THANK YOU SOOOOOO MUCH! I appreciate your time!!!

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WOW thanks so much I will check out your app today FOR SURE!!!

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THANK YOU WOW SO HELPFUL I have a little bit more to do then THANK YOU