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Preview could not be created


confluence is not able to create a preview, if the file (eg. excel-file - 4,5 Mbyte) is too great. Smaller files are possible.

How can i increase the preview size?

Or is it a limitation of databaase?

Thanks and best regards,


1 answer

0 votes
Diego Atlassian Team Oct 31, 2019

Hello there, @reinhard_rossmy_polizei_bayern_de ! Great to have you share with our community.

As I understand, your instance is having trouble to create previews of excel files that exceed a certain size. There are a few things that we could try! Here we go:

  • Copy the file and rename it. Check if uploading the copied version yields any different results.
  • If the copy yields the same results, try reducing the number of rows in the table. The number should match one of the tables that actually generate a preview in Confluence
  • Try another browser
  • Try the current browser’s incognito mode


I would like to ask you a few questions for clarification, Reinhard. Would that work for you? Here are my questions:

  1. Is this affecting other types of files as well? If yes, which types?
  2. Are there any errors thrown when you try to preview the excel file?
  3. What exactly displays when you try to use the attachment preview?
  4. Is the affected file (or files) of the .xls or .xlsx type (or both)?


Let us hear from you, Reinhard! Looking forward to your reply.

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