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Increase the upload limit to more than 10MB in PowerApp Application

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Posted on by CU24061353-0

In a PowerApp application , how to increase the upload limit to more than 10MB? I am using a V2 flow and saving the attachments to Sharepoint. I have tried changing the attachment settings but that did not help. Any suggestions/guidance will be helpful.

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Fredrik_A 3,595 Super User 2026 Season 1 on at

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Hello,

you should be able to increase it using the steps below.

Select the Attachment control in your app.
Go to the Advanced tab in the right-hand pane.
Find the MaxAttachmentSize or SizeLimit property.

If my response solved your issue, please mark it as ✅ Accepted Answer and give it a like.

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CU24061353-0 2 on at

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Hi Fredrik,

Thanks for your response. I have already increased the MaxAttachmentSize, but still it fails. I am calling PowerAutomate V2 flow when attaching the file. I get the below error. Kindly advise.

"message": "The response is not in a JSON format.", "innerError": "Cannot read server response." } }

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CU27030035-0 105 on at

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I think that's un related to your size issues

If your using the Power automate trigger "Power apps (V2)" the file option it expects the file in JSON format

So in you app where you have the code you need to put the attachment in as JSON

so If I had a flow that uploaded an attachment to one drive from an attachment control the code to trigger it would look like this

UploadfiletoOnedrive.Run({file: {contentBytes: attachments_Control.Value,name: Attachments_Control.Name}})

Then you would need a create file step on your power automate flow

To get the file name Variable use paste the following into the file name field

@{triggerBody()?['file']?['name']}

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WarrenBelz 154,966 Most Valuable Professional on at

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Hi @CU24061353-0,

This creates a few challenges, but should be achievable. Firstly your fundmental issue I believe is that the Power Apps V2 trigger cannot handle that much raw binary data (I have seen posts on this before), so you need to give it some JSON Text. The further issue is that an attachment control does not store the Value component in a manner that is able to be directly converted to JSON, so a little trickery is required.

Firstly, put an Image Control on the screen (and hide it) with the Image property
Last(YourAttachmentControlName.Attachments).Value

Now your Flow run parameters will look something like this
With( { _Content: With( { _JSON: JSON( YourHiddenImage.Image, JSONFormat.IncludeBinaryData ) }, Mid( _JSON, Find( ",", _JSON ) + 1, Len(_JSON) - Find( ",", _JSON ) - 1 ) ) }, YourFlowName.Run( Last(YourAttachmentControl.Attachments).Name, _Content ) )

and the Flow will look like this

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Raghu Kora 10 on at

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You already have solutions to the problem posted by some. But please keep in mind before increasing/ how much you are increasing as it could impact performance. Please keep that in mind

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