ButterShare

ButterShare is a browser-based peer-to-peer file transfer tool for sending large files and folders directly between devices.
Instead of uploading files to a cloud storage provider first, ButterShare uses WebRTC to establish a direct connection between sender and receiver whenever possible. This makes it useful for developers, creators, remote teams, and anyone who regularly needs to move large or temporary files between devices.
ButterShare can be used to share project archives, build files, datasets, videos, design assets, database exports, logs, documents, and other large files without creating an account.
Users simply select a file, generate a sharing link or QR code, and open it on the receiving device. ButterShare works directly in the browser across Windows, macOS, Linux, Android, and iPhone.
Key features include peer-to-peer transfers, encrypted connections, no mandatory signup, no cloud storage for direct transfers, link and QR sharing, cross-platform support, and support for large files and folders.
ButterShare is especially useful when traditional options such as email attachments, messaging apps, Git repositories, or cloud drives are inconvenient for temporary or large file transfers.