How to post multipart/form-data from Angular to Nodejs Multer?

Remove your 'Content-Type': 'multipart/form-data' header and it should work.

I got the same error, this is due to the missing boundary=.. just after multipart/form-data like the following working request:

When you remove your header, browsers will add it automatically with the boundary=.. and it works.

Add Content-Type': 'file' in header and it should work