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Post Letters - What file formats are supported?

Paper Size

We support A4, but will auto resize for countries like the US.

File Size

10 MB max. If you need larger files to be supported, please let us know.

File Formats

Via the Dashboard or Email to Post

  • 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

This will return a URL to the converted pdf file that can be used in the /post/letters/send endpoint.

More info: http://docs.clicksend.apiary.io/#reference/post-letter/send-post-letter/send-post-letter

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