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.

Why is Bluetooth transfer so slow on Windows?

Bluetooth was designed for low-power peripherals (mice, keyboards, audio), not large data payloads. Bluetooth file transfers rarely exceed 1.5–2 Mbps (approx. 200 KB/s). ButterShare uses high-speed browser transfers over Wi-Fi, delivering speeds up to 50–100 MB/s.

How do I share files between two Windows PCs wirelessly?

Open buttershare.com on both Windows PCs. On PC 1, drop the files and click Send. On PC 2, enter the 6-character room code. The files will stream directly over your local network from one PC to the other.

Does ButterShare work with Microsoft Edge on Windows 11?

Yes. Microsoft Edge is built on Chromium and fully supports the File System Access API, enabling high-performance direct-to-disk streaming.

Wireless File Transfer for Windows

Why ButterShare

A Simpler, Faster Way to Transfer Files

Moving files wirelessly to and from a Windows PC has historically been a headache. Windows SMB network sharing requires navigating confusing workgroups, folder permissions, and Windows Firewall rules. Bluetooth file transfer is painfully slow (capping out at 1–2 Mbps). And proprietary tools like Apple AirDrop or Quick Share don't play nicely across rival platforms. ButterShare turns any Windows 11 or 10 machine into a universal wireless transfer hub using standard web browsers (Edge, Chrome, Brave, Firefox). Share files with Android, iPhone, Mac, Linux, or other PCs in seconds.

Direct Browser Transfer

Encrypted Browser Transfer

Pure direct Architecture

Engineered for Maximum Speed & Privacy

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

Universal Cross-Platform Hub

Send and receive files between Windows and Android, iPhone, iPad, macOS, Linux, or ChromeOS seamlessly.

No SMB Configuration Headaches

Skip complex Windows network sharing settings, folder permissions, and firewall troubleshooting.

Direct-to-Disk Browser Streaming

Receives incoming files directly into your Windows SSD/HDD via the File System Access API without browser memory bloat.

Gigabit Wi-Fi Throughput

Utilizes your local network bandwidth for speeds up to 100x faster than legacy Bluetooth transfer.

Streamlined 3-Step Flow

How to Transfer Files to Windows in 3 Steps

Start transferring in seconds with zero software installation.

01Step 1

Select Files on Any Device

Drop files or folders into ButterShare on your phone or PC.

02Step 2

Pair via 6-Digit Code or QR

Scan the QR code with your mobile camera or enter the room code on your Windows machine.

03Step 3

Save Directly to Windows

The files transfer directly into your downloads folder with live progress and transfer speed metrics.

ButterShare vs Traditional Windows Wireless Methods

Honest comparison of limits, speeds, and privacy.

Key Features	ButterShare Direct	Windows SMB / Bluetooth / Nearby Sharing
Setup Complexity	Zero config (open browser tab)	SMB: Workgroups, permissions, firewall
Cross-Platform Compatibility	Windows, iOS, Android, Mac, Linux	Nearby Sharing: Windows 10/11 only
Transfer Throughput	Full Wi-Fi speed (50–100MB/s)	Bluetooth: ~100–300 KB/s (extremely slow)
File Size Ceiling	No limits (100GB+ tested)	Bluetooth: Fails on files >50MB

Frequently Asked Questions

Got questions? We've got answers

Everything you need to know about wireless file transfer windows, transfer limits, and privacy.

Browse Platforms & Alternatives

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.

No 2GB File Limits

100% Private (0 Bytes Stored)

Every Device & Browser

Wireless Windows Transfer,Share anything. No limits.

Drop any files or folders here