ButterShare· Large file transfer tool
Send large files free with no size limits, zero cloud storage, and no signup.
Developer Tools·Productivity·Communication
What is ButterShare?
ButterShare is a large file transfer tool.
ButterShare is a browser-based peer-to-peer file transfer tool that allows users to send files and folders directly between devices through an encrypted WebRTC connection. Designed for anyone needing to share large files without going through traditional cloud storage, it features zero file-size caps, end-to-end encryption, and no required accounts or signups.
It is built for individuals and professionals—such as video editors, game developers, sysadmins, and music producers—who regularly handle multi-gigabyte payloads like raw video footage, 3D assets, and database dumps. Transfers stream in real time and write directly to disk in chunks using the browser's Origin Private File System.
What makes ButterShare different from legacy cloud uploaders is its direct device-to-device architecture and zero-knowledge encryption. File data does not pass through cloud storage or intermediary servers, ensuring that transfer sessions remain completely private and free from storage quotas or subscription upsells.
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