Is there really no file size limit? How does this compare to WeTransfer?

Unlike WeTransfer which caps free transfers at 2GB and charges $12/month for larger files, ButterShare has zero file size limits. Files stream directly between your device and the recipient's device with 100% privacy. Because zero bytes are stored on a cloud server, you can send 10GB, 50GB, 100GB, or even larger folders without paying a dime.

Do my files ever get uploaded to your servers?

Never. There is no cloud storage, no database caching, and no file hosting. Our connection broker is only used for a split-second handshake to connect the two browsers. Once the direct connection is open, bytes stream strictly device to device. Zero bytes are ever retained anywhere.

How secure is the transfer? Can anyone intercept my files?

ButterShare uses an encrypted browser connection between the paired devices. File bytes do not sit on ButterShare cloud storage, and the room server only helps the two devices find each other.

Does the recipient need to install an app or sign up?

No. The recipient simply visits ButterShare and enters your 6-character room code (or clicks your share link). The transfer initiates immediately inside their standard web browser on any phone, tablet, or computer. No accounts, no passwords, no app installs.

Can I transfer files wirelessly between any device (Windows, Android, iPhone, Mac)?

Yes, exactly. ButterShare brings seamless, wireless device-to-device file transfer to every operating system. You can send files directly between iPhone, Android, Windows PC, Mac, and Linux with zero cables, app installs, or cloud middleman.

Can I transfer whole folders without zipping them first?

Yes. Drag and drop any folder into ButterShare. It is automatically packaged in your browser and transferred intact with its full folder directory structure preserved.

What happens if someone closes their browser tab during a transfer?

Because files stream directly between devices in real time, both browser tabs must stay open until the transfer completes. If a connection drops, ButterShare alerts you immediately with instant reconnection options. Your original files never leave your device.

Why is ButterShare completely free? What's the catch?

Because ButterShare does not host or store your files on expensive cloud servers (like AWS or Google Cloud), our operating costs are negligible. We don't have massive storage bills to pay, so we never need to charge you subscription fees or limit your file sizes.

Can Chrome or Edge handle 100GB files without crashing?

Yes! ButterShare uses the Chromium File System Access API (FileSystemWritableFileStream) to write 64KB chunks directly to disk, keeping RAM consumption under ~50MB throughout the entire 100GB transfer.

Send 100GB File Free Online (No Limits, Direct Stream)

Why ButterShare

A Simpler, Faster Way to Transfer Files

Cloud lockers charge $10 to $50/month for storage buckets large enough to hold 100GB. ButterShare connects the sender and recipient's hard drives directly via high-speed direct browser connections, streaming bytes continuously without filling browser RAM.

Direct Browser Transfer

Encrypted Browser Transfer

Pure direct Architecture

Engineered for Maximum Speed & Privacy

No cloud storage middleman. Direct browser-to-browser streaming.

Direct-to-Disk Writing

Streams incoming chunks straight to SSD or hard drive, bypassing browser memory limitations.

Intelligent Backpressure

Dynamically regulates chunk flow based on network buffer thresholds to prevent memory crashes.

Zero Monthly Fees

No subscription tier required. Unlimited size transfers are permanently free.

Resume & Pause Controls

Pause and resume transfers on demand with real-time transfer speed and ETA estimates.

Streamlined 3-Step Flow

How to Transfer 100GB in 3 Steps

Start transferring in seconds with zero software installation.

01Step 1

Select Huge Files

Drop your 100GB+ files or folders into ButterShare.

02Step 2

Share Room Link

Send the 1-click room URL to the recipient.

03Step 3

Stream Direct to Disk

The recipient selects their download directory and streams the file directly to disk.

Frequently Asked Questions

Got questions? We've got answers

Everything you need to know about send 100gb file free, transfer limits, and privacy.

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Drop any file or folder above to start an instant device-to-device stream. No accounts, no subscriptions, 100% free.

No 2GB File Limits

100% Private (0 Bytes Stored)

Every Device & Browser

Send 100GB Files Free,Share anything. No limits.

Drop any files or folders here