How to customize picked image data as a base 64 string to upload to WebAPIs

[PhyoeKo]

I am using this package as a text editor, there user can write both text and image as well, then I produce result to Html code. There I am getting html img attribute data is picked file path. Likes <img src="/data/user/0/com.example.app/app_flutter/image_picker6905649150262524545.jpg" alt="" />

I want to replace base64 string instead of file path, is there any way to achieve my issues.
Thanks you.