Download blob from azure blob storage using Azure REST API from Powerapps

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Posted on by rohitsbots

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I am trying to download blob from azure blob storage using Azure REST API from Powerapps. I am providing blob name as the parameter to azure "Get Blob" operation but it is returning the actual content to powerapps. How to download the blob using the content? I am using Entra ID for authorization. Copilot tells me to use Launch("data:application/pdf;base64," & pdfResponse["$content"]) but this is not working.

"body": {
"$content-type": "application/pdf",
"$content": "{base64 content}"

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Building Power Apps

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Michael E. Gernaey 53,493 Super User 2025 Season 2 on at

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HI @rohitsbots

Launch and Download are 2 different things. (but please do not post in 2 different places, its hard enough for us few to answer questions, without double posts).

1) you should share not just some code you tried to get from Copilot, but everything you are doing, as we don't know what pdfResponse even is.

2) are you sure (just checking) its base 64 content encoded already? (very possible, but I don't know how you put it there).

That all being said, you should just be able to use a SAS Token, with the URL to the blob file. That is what I would recommend.

I would then decide whether you want to download it or Launch, where launch requires a mime type in your browser bla bla.. Download tries to download it.

Slightly different activities.

If these suggestions help resolve your issue, Please consider Marking the answer as such and also maybe a like.

Thank you!
Sincerely, Michael Gernaey

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Power Platform 1919 1,898 on at

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Hi @rohitsbots,
the workaround what i use generally is (Power Automate Way):
1. Prepare your inputs to pass to flow as Input parameters
2. Get the file content for selected azure blob (binary content)
3. Then use Onedrive connector to create a file with the fetched content
4. Then generate a share link for the newly created file
5. Send the generated link back to power apps (use download /launch function Along with ?download=1 to force download)
6. add a delay of 30 seconds or upto 5 min and delete the file.

I always use this workaround if I have to download anything to power apps.

And as @Michael E. Gernaey mentioned, please try to keep your query in single post instead of multiple posts.

Please give the mentioned solution a try and let me know whether it works for you.
If it solves your issue, feel free to mark this thread as answered.
Please make sure to like the response!
Thanks!
- Hemanth Sai

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Michael E. Gernaey 53,493 Super User 2025 Season 2 on at

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Hi @rohitsbots

I believe this one maps to our other issue with your expression is in double quotes and shouldn't be.

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