Drop PDFs to upload here
This app talks to the reMarkable cloud on your behalf. To do that it needs a one-time code, which it exchanges for a device key that this browser keeps; the server holds no copy. You do this once per browser.
The key grants full access to your reMarkable cloud files. It never leaves this machine — revoke it any time from your device list.
Search lrclib, fix up whatever it hands back, then send it to your reMarkable as a PDF.
Results appear here.