File previews here refer to the in app/browser rendering of the contents of a file. Request to add a mime type for preview at

A full list of all the supported file previews are as follows:


  • application/pdf

  • application/vnd.openxmlformats-officedocument.wordprocessingml.document

  • application/vnd.openxmlformats-officedocument.spreadsheetml.sheet


  • image/png

  • image/jpg

  • image/gif

  • image/svg

  • image/webp


Frappe Drive lacks any transcoding pipeline for now so only H264, H265*, and AV1* codecs are supported for video streaming.

  • video/mp4

  • video/webm

  • video/quicktime


Generally most text files should preview but this is ever expanding so we might miss some.

  • Most mime types with starting with text/

* Support for this codec is platform dependant. For example: H265 only works on MacOS and Windows running Chrome (Safari also supports it).