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.

How do I transfer files from Mac to Windows PC wirelessly?

Open buttershare.com on both Mac and Windows PC. Drop your files on the sending device, pair via the 6-digit room code or QR code, and files will stream directly device-to-device.

Do both devices need to be on the same Wi-Fi?

ButterShare works on the same local Wi-Fi network at full router bandwidth, and also across different networks or cellular data when the devices can make a secure connection.

Is there any quality loss on 4K videos or photos?

No. ButterShare never compresses, transcodes, or alters your files. Files arrive 100% bit-for-bit identical to the originals.

Mac to Windows File Transfer (Wireless, Free & Fast)

Why ButterShare

A Simpler, Faster Way to Transfer Files

Setting up SMB network sharing between macOS and Windows is notoriously finicky with permissions and workgroups. ButterShare eliminates network share configuration: open the site on both computers and beam files instantly.

Direct Browser Transfer

Encrypted Browser Transfer

Pure direct Architecture

Engineered for Maximum Speed & Privacy

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

No Cables, iTunes, or Drivers

Transfer directly between Mac and Windows PC in any browser tab without software installation.

No ButterShare Size Limit (100GB+ Tested)

Send full-resolution 4K ProRes videos, RAW photo galleries, and huge archives without hitting cloud subscription paywalls.

Streams Directly to Disk

Incoming chunks stream directly into local storage using the browser File System Access API without RAM bloat.

Private Encrypted Transfer

Your files travel through an encrypted browser connection. File bytes are not stored on ButterShare servers.

Streamlined 3-Step Flow

How to Transfer Files from Mac to Windows PC

Start transferring in seconds with zero software installation.

01Step 1

Select Files on Mac

Open buttershare.com on your Mac and pick photos, videos, or folders.

02Step 2

Connect with Windows PC

Scan the generated QR code with your camera or enter the 6-character room code on Windows PC.

03Step 3

Direct High-Speed Stream

Files stream directly device-to-device at local Wi-Fi throughput and save straight to disk.

ButterShare vs Traditional Methods (Mac ↔ Windows PC)

Honest comparison of limits, speeds, and privacy.

Key Features	ButterShare Direct	Cables / Cloud / Bluetooth
App Installation Required	Zero (pure web browser)	Requires companion software or drivers
Hardware Cable Required	No (100% Wireless)	Frequently requires USB-C / Lightning cable
File Size Ceiling	No limits (100GB+ tested)	2GB - 15GB free cloud drive caps
Cloud Privacy	Zero cloud file storage	Stored on external cloud datacenters
Account / Registration	None required	Requires account login & email verification

Frequently Asked Questions

Got questions? We've got answers

Everything you need to know about mac to windows file transfer, 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.

No 2GB File Limits

100% Private (0 Bytes Stored)

Every Device & Browser

Mac to Windows Transfer,Share anything. No limits.

Drop any files or folders here