Unable to upload a file larger than 1.2GB (1,214,843 KB as reported by Explorer)

Needs root cause Issue #15099599 • Assigned to Brandon M.


Abraham L.
Dec 14, 2017
This issue is public.
Found in
  • Microsoft Edge
Found in build #
Needs root cause
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Reported by 2 people

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Steps to reproduce

When I attempt to upload a file 1.2GB or larger, Win 10 Edge tab crashes. After it crashes, Edge attempts to recover the tab using the same url. But the upload fails.

I monitored the memory usage (from task manager) during the process. It appears that the upload process ran out of memory. My machine has 16GB of physical memory.

I repeated the same process with the same file in FF, Chrome, and IE11. The file is uploaded successfully.

It also appears to be the same issue reported here: https://social.msdn.microsoft.com/Forums/en-US/efde1d4c-6bdf-42b9-ac53-e3168032cab2/big-edge-memory-leak-on-file-uploads?forum=iewebdevelopment

I am running Win 10, Edge 41.16299.15.0.


1 attachment

Comments and activity

  • Microsoft Edge Team

    Changed Assigned To to “James M.”

  • Hello,

    Thank you for providing this information about the issue. The similar issue you linked has the same results in all browsers we tested. Please provide us with the webpage where you conduct your upload, so we can best repro this problem.

    Best Wishes,
    The MS Edge Team

  • I have just attached a zip file containing a html, js, and css files. They are adopted from:


    Modify the js file to name the target (e.g. “tmp/afile”) accordingly. Run a http server to serve the index.html file, . Then try browse/select a file approx 2GB to 4GB big. You would see that Chrome and FF will be able to upload the file successfully. Edge 40 and 41 would crash and reload the page and the upload would fail.

  • Microsoft Edge Team

    Changed Assigned To to “travil”

    Changed Assigned To from “travil” to “Brandon M.”

    Changed Status to “Needs root cause”

  • Any status update on this defect since 12/22/2017? Can you provide an Estimate fix date and version?

  • To Microsoft Edge Team, please provide update information about this issue. I have already provided sample code on how to reproduce the problem 2 months ago. Is it going to be fixed at all?

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