Original file
Best quality
Choose files on the PC, let the phone scan the room and use Smart Send only when a smaller or more compatible media copy would help.
Start the transferEither way you get a code. Whichever device has a camera scans it.
Or open the link, or type the name.
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Checking whether the original file is the best fit.
Best quality
Better compatibility
FCShare never changes your original file. Optimization only happens after you choose it.
No copy was kept anywhere.
A phone may have a smaller screen, tighter browser storage and different codec support than the PC that created the file. Smart Send lets the receiving browser express those constraints coarsely.
The receiver can also choose Best for this device, Original quality or Smaller version as a preference. The sender still makes the final decision.
Documents stay original; media is inspected locally.
The receiver sends an ephemeral capability profile over WebRTC.
The sender explicitly picks original or an available optimized copy.
Preferences are advisory, not commands. They are sent through the DataChannel and disappear with the session.
FCShare uses phrases such as “browser storage appears limited” rather than pretending to know exact free-disk bytes.
Yes, as a preference. The sender still approves any change.
No.
No. The capability profile intentionally uses broad categories.