Use http. MultipartRequest instead of http. post for files.
Read moreHow do I upload files to Flutter server?
Server Side PHP Code: test/file_upload .php Now flutter part, Add the file_picker, path, and dio Flutter package in your project by adding the following line in pubspec. yaml file. In this way, you can upload file from flutter. Use this code base in your project and make your app great.
Read moreHow do I upload a PDF to a file?
A file host gives you the ability to add your PDF to the server so you can use it as personal file storage, or offer the link to others. Use a free, online file host option, such as KeepandShare, Google Docs or MediaFire, to upload your PDFs .
Read moreHow do I upload a PDF to API?
How to Upload File With PDF.co API and Postman?
Read more