Types of Data Encoded in Base64

Within an application I am developing, there is a feature for downloading files that are stored as Base64 strings. It is essential to correctly pair the data types with the corresponding files in order to ensure successful downloads.

I thought I had sorted this out quite well. However, it appears that docx files are being downloaded as doc files and xlsx files as xls files. Is there a way to download these files in their proper file formats? Unfortunately, most of the websites that provide information on this topic are restricted by company policies.

For docx files, I currently have data:application/msword

and for xlsx files, I have data:application/vnd.ms-excel

javascriptbase64

Answer №1

When dealing with .xlst files, the correct MIME Type is: 

application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

For .docx files, use the following MIME Type: 

application/vnd.openxmlformats-officedocument.wordprocessingml.document

To learn more about the correct content-type for excel files, check out this helpful resource: What is correct content-type for excel files?

Referencing information from :

Ext    MIME Type
.doc   application/msword
.dot   application/msword
.docx  application/vnd.openxmlformats-officedocument.wordprocessingml.document
.dotx  application/vnd.openxmlformats-officedocument.wordprocessingml.template
.docm  application/vnd.ms-word.document.macroEnabled.12
.dotm  application/vnd.ms-word.template.macroEnabled.12
.xls   application/vnd.ms-excel
.xlt   application/vnd.ms-excel
.xla   application/vnd.ms-excel
.xlsx  application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
.xltx  application/vnd.openxmlformats-officedocument.spreadsheetml.template
.xlsm  application/vnd.ms-excel.sheet.macroEnabled.12
.xltm  application/vnd.ms-excel.template.macroEnabled.12
.xlam  application/vnd.ms-excel.addin.macroEnabled.12
.xlsb  application/vnd.ms-excel.sheet.binary.macroEnabled.12

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