Post Letters - What file formats are supported?
Paper Size
We support A4, but will auto resize for countries like the US. (Note: We DO-NOT support frameless “edge-to-edge” printing in the US).
File Size
10 MB max. If you need larger files to be supported, please let us know.
File Formats
Via the Dashboard
- docx
- doc
- rtf
If you need any more file types, please let us know.
Via the API
If you need to convert a file to a PDF, it can be first passed to our uploads endpoint: /uploads?convert=post View Docs
This will return a URL to the converted pdf file that can be used in the /post/letters/send endpoint View Docs