4K video transfer

Send 4K video without making the recipient guess.

Keep the 4K original, but let Smart Send flag when 1080p would be a more practical target for the receiving device.

Start the transfer

Either way you get a code. Whichever device has a camera scans it.

Choose a file.

Drop a file here or browse

Scan this.

Or open the link, or type the name.

—

Enter the code.

Smart Send

Recipient ready.

Checking whether the original file is the best fit.

Recipient capabilities are approximate and temporary.

Original

Original file

Best quality

Technical details

FCShare never changes your original file. Optimization only happens after you choose it.

Save this?

Transferring

Moving now.

0 B of 0 B —

—Speed

ConnectingPath

EncryptedIn transit

Delivered.

No copy was kept anywhere.

Stopped.

Ready

Room—

Route—

Payload—

The short answer

Resolution is only useful if the receiver can use it

A 4K file may be the right archival choice and the wrong delivery choice. Small screens, limited storage, HEVC support and moderate bandwidth can all make a smaller version more practical.

FCShare estimates that tradeoff without changing the source. When the sender browser proves it can perform the required decode/encode path, Smart Send can create the smaller version locally while it is being transferred.

How to do it

Three steps, in the browser.

1
Choose the 4K file
Local inspection identifies size, codec and dimensions when they can be read safely.
2
Connect the receiver
Screen and codec capability are shared only in coarse form.
3
Choose quality intentionally
The original is always usable; recommended targets are clearly labeled estimates.

Best for

4K60 phone footage
Large camera exports
Phone or laptop recipients
Original-quality archival handoff

What stays intact

4K original unchanged
No automatic downscale
No server upload
Technical details behind disclosure

Know before sending

1080p transcoding depends on sender browser codec support
On-the-fly MP4 output uses fragmented MP4
Transfer still depends on upload and conversion speed
Playback app matters

What “recommended” means

A recommendation combines the file properties that could be detected with a minimal receiver profile. Unknown support stays unknown instead of being treated as certainty.

Why 1080p appears often

For many laptop and phone delivery cases, 1080p H.264 is a broadly compatible target. FCShare does not claim it is always the best archival format.

Questions people ask

Does 4K automatically become 1080p?

No. Never silently.

Can I always choose the original?

Yes.

Does Smart Send know exact screen resolution?

It sends only a broad screen class rather than a fingerprint-like precise display profile.