fırlat is a free way to send files in the browser. No install, no account.
Both windows stay open. The file is not uploaded to a server. The two browsers connect to each other. If one closes, the transfer stops.
On the same local network, computers with fırlat open are listed only at the bottom of the Local network screen. If you both tap Connect, you pair without a code. Star a device to keep it on top.
It also reaches someone on another network. Each person reads their four-character code. The file still goes browser to browser.
Files, folders, and a short note. A dropped folder keeps its structure. There is no app size limit. Save as lets you choose where it lands.