ButterShare

ButterShare is a free browser-based peer-to-peer file transfer tool that enables users to send large files and folders directly between devices without uploading to cloud storage or requiring an account. It supports cross-platform transfers on Windows, macOS, Linux, iOS, Android, and ChromeOS using encrypted WebRTC connections, ensuring privacy and no file size limits. Designed for professionals like video editors, game developers, and legal teams, ButterShare offers fast, secure, and private file sharing without storage quotas or third-party servers.

Who is it for?

Professionals and teams needing secure, large file transfers across devices without cloud storage

Problem

Traditional file sharing services impose size limits, require accounts, or store files on cloud servers, leading to privacy concerns and slow transfers due to upload queues and storage quotas.

Solution

ButterShare streams files directly between devices over encrypted WebRTC connections without uploading to cloud storage or requiring sign-up, enabling fast, private, and unlimited file transfers across platforms.

What makes it unique

• Direct peer-to-peer streaming with zero cloud storage
• No file size limits or compression required
• End-to-end encryption with ephemeral session keys
• Cross-platform browser compatibility without apps or accounts

• Direct device-to-device transfer

  Files stream directly between devices using encrypted WebRTC connections without cloud intermediaries.

  01
• No file size limits

  Supports transfers of any size limited only by device storage and browser capabilities.

  02
• Cross-platform compatibility

  Works on Windows, macOS, Linux, iOS, Android, and ChromeOS via modern browsers.

  03
• End-to-end encryption

  All data is encrypted with keys held only by sender and receiver, ensuring privacy.

  04
• No account or sign-up required

  Users can transfer files instantly without registration or login.

  05
• Resumable transfers

  Supports resuming interrupted transfers using locally stored checkpoint data.

  06
• Folder structure preservation

  Maintains directory hierarchy when sending nested folders.

  07
• Native disk streaming

  Streams files in chunks directly to disk using browser's Origin Private File System.

  08

Business model

SAAS

Audience

B2B

Platforms

web

Pricing model

free

Value proposition

Send large files directly between devices securely with no size limits or cloud storage.

Metadata

OOpen Graph

Other

CloudflareGoogle AnalyticsUmamiReact

Protocol

HHTTP/3

RUM

CCloudflare Browser Insights

UI framework

Tailwind CSSRadix UI

UI library

shadcn/uiLucide

Web app

PWA

Web framework

Next.js