AlterSend

AlterSend is an open-source tool designed for private, peer-to-peer file transfer between devices. It addresses the need for secure and unrestricted file sharing without relying on cloud storage or requiring user accounts. Files are sent directly from one device to another using end-to-end encryption, ensuring that data remains confidential and is never stored on intermediary servers.

The process for transferring files with AlterSend involves pairing devices through a QR code or a join code. Once devices are paired, they are remembered for future transfers, eliminating the need to repeat the pairing process. The tool establishes an encrypted channel between devices, utilizing the ChaCha20-Poly1305 encryption algorithm to protect data during transit. There are no limitations on file size, and users are not required to sign up or create accounts to use the service.

AlterSend is available for multiple platforms, including Mac, Windows, Linux, iOS, and Android. It is free to download and use, and its source code is accessible on GitHub. The tool is suitable for individuals who prioritize privacy and seek a straightforward method for transferring files across the internet without the constraints of cloud-based solutions or network restrictions.

By focusing on direct, internet-wide peer-to-peer transfers and robust encryption, AlterSend distinguishes itself from other file transfer tools that may impose network limitations, require cloud uploads, or lack comprehensive privacy protections.