A Simpler, Faster Way to Transfer Files
Traditional file sharing services force you into paid subscription tiers the moment your file exceeds 2GB. ButterShare bypasses cloud storage limitations by piping data directly from your hard drive to the recipient's hard drive over high-speed direct browser connections.
Engineered for Maximum Speed & Privacy
No cloud storage middleman. Direct browser-to-browser streaming.
No ButterShare Size Limit (100GB+ Tested)
Bounded only by your available disk space. Send 20GB video archives, virtual machines, or RAW photo folders.
Streaming Direct to Disk
Utilizes browser File System Access API to stream incoming chunks to disk without choking browser RAM.
Backpressure Flow Control
Adaptive 64KB chunking monitors network buffer thresholds to maintain maximum throughput without dropped packets.
Encrypted Browser Transfer
Browser-level encryption helps ensure only the paired recipient can receive and assemble the file.
How to Send Huge Files in 3 Simple Steps
Start transferring in seconds with zero software installation.
Select Any Large File or Folder
Drop your multi-gigabyte files into ButterShare.
Share Direct Room Link
Send the 1-click room URL to your recipient.
Stream at Max Bandwidth
Watch live transfer metrics as the file transfers directly.
Got questions? We've got answers
Everything you need to know about send large files free, transfer limits, and privacy.
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Ready to Transfer Files Without Limits?
Drop any file or folder above to start an instant device-to-device stream. No accounts, no subscriptions, 100% free.