ValidSign supports the following documents/file types: .PDF, .DOC, .DOCX, .ODT, .RTF and .ODT.
We also support any document that can be printed from a Windows application (e.g. .xls, .xlsx, .ppt, .pptx, etc.). You can easily print or save your file as PDF and upload that file to ValidSign.
What you should keep in mind is that we automatically convert all documents you upload to .pdf. In the conversion it may happen that not everything is converted correctly and that some things are not aligned correctly as a result. We therefore recommend that you convert your files to PDF beforehand before uploading them.