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High memory usage during and after xls file conversion


when we try to convert the attached xls file to html there will be an high memory usage of the associated process.

The conversion succeed after several minutes, but the memory does not fall down anymore.
In our example the allocated memory are more than 500MB!

Thank you in advance.


Sacha End


Thanks for your posting and using Aspose.Cells for .NET.

I was able to replicate this issue using your file with the following using the latest verison:
for .NET v7.3.1.1

The memory consumption is increasing as higher as 500 MB.

We have logged this issue in our database. We will look into this issue and once the issue is fixed or we have some other update for you, we will let you know.

This issue has been logged as CELLSNET-41020.

Please see the screenshot below for your reference. Here is the test code.


string filePath = @“F:\Shak-Data-RW\Downloads\Sample.xlsx”;

Workbook workbook = new Workbook(filePath);

workbook.Save(filePath + “.out.html”);



Please try the latest fix: Aspose.Cells for .NET v21.6.1:
Aspose.Cells21.6.1 For .Net2_AuthenticodeSigned.Zip (5.5 MB)
Aspose.Cells21.6.1 For .Net4.0.Zip (5.5 MB)
Aspose.Cells21.6.1 For .NetStandard20.Zip (5.5 MB)

Your issue should be fixed in it.

Let us know your feedback.