Post Letters - What file formats are supported?

Updated 3 months ago

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

  • PDF
  • docx
  • doc
  • rtf

If you need any more file types, please let us know.

Via the API

  • PDF

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


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