ToffeeShare
toffeeshare.com
Streams a file from your browser to theirs with no copy in between
No sign-upOn device
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pairdrop.net
Finds other browsers on your network and sends files straight to them.
PairDrop is the maintained successor to Snapdrop: open it on two devices on the same network and each appears on the other's screen as a named avatar you can drop a file onto. Devices elsewhere can be paired with a six-digit code or a shared room name. Transfers go directly between browsers over WebRTC, so nothing is uploaded to a service and it keeps working on a local network with the internet unplugged.
AltFTool does this too
If you would rather not leave the site, Animated QR File Beam covers the same job here — free, no account, and it runs in your browser.
Open Animated QR File BeamQuestions
Works the moment the page loads. No account, no email, no trial. Both devices must be online with the tab open at the same moment, and nothing is stored for later.
No. PairDrop does the work inside your browser, so the file never leaves your device — you can load the page, disconnect from the network, and it still works. That makes it a reasonable choice for material containing personal data.
Both devices must be online with the tab open at the same moment, and nothing is stored for later.
Alternatives
Same category or same task, ordered by how closely they overlap.
toffeeshare.com
Streams a file from your browser to theirs with no copy in between
file.io
Uploads a file and deletes it the moment someone downloads it
send.tresorit.com
A 5 GB end-to-end encrypted drop that needs no sign-up on either side
wormhole.app
Encrypts the file in your browser, then hands you a self-expiring link
send-anywhere.com
Pairs two devices with a six-digit key instead of sending a link
fromsmash.com
Sends a file of any size without charging you for the big ones