Multimodal Input for LLM Features: Images, PDFs and Audio from the Browser
The frontend side of sending files to an LLM: file input, drag-and-drop and paste, sniffing types by magic bytes, downscaling images and stripping EXIF in the browser, HEIC from iPhones, PDFs, recording audio with MediaRecorder, presigned uploads with progress and cancellation, object URL cleanup, accessibility and what the server must still check.
Frontend & UI8 min