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.

ButterShare

Share Anything, To Anyone,No File Limits

Send 10GB, 50GB, or 200GB+ files straight from your device to theirs — no size caps, no cloud storage, no signup. Direct, encrypted transfer for iPhone, Android, Windows, Mac, and Linux.

Drop any files or folders here

Send anything — photos, 4K videos, documents, or entire folders without size limits.

Learn How It Works

Streamlined 3-Step Flow

Sending takes seconds, not sign-ups

No cloud storage, no waiting for upload queues, no accounts. Three simple steps and your files beam directly device to device.

01Select Files

Select your files or folders

Drag and drop any files or entire folders. No size limits, no compression required. Folders are packaged cleanly right in your browser.

02Share Code

Share your 6-character code

Get an instant 6-character room code, link, or QR code. Send it to your friend, coworker, or your own second device. No sign-up needed.

03Stream Direct

Stream direct device to device

As soon as they connect, files stream directly between devices through an encrypted browser connection. File bytes are not saved to cloud storage.

Direct Device-to-Device

Why direct streaming is fundamentally better

Eliminate cloud queues, storage quotas, and third-party servers. Experience fast browser transfer speeds by connecting two machines directly with zero compromises.

0 CLOUD HOPS

Direct Device Link

Direct device to device

Files beam straight between browsers — zero bytes uploaded, stored, or cached on a server.

Zero Cloud Storage

Line-Speed LAN/WAN

ZERO-KNOWLEDGE

Encrypted in Browser

End-to-end encrypted

Every 64KB chunk is sealed with cryptographic keys held only by the two connected devices.

No Server Decryption

Ephemeral Keys

UNLIMITED SIZE

Stream-to-Disk

No file size limits

Send gigabytes or terabytes without compression, subscription paywalls, or memory bottlenecks.

Browser Stream to Disk

Terabyte Tested

ButterShare — Your Best Choice for
Unlimited, Private File Transfer

Features	ButterShare Direct	WeTransfer	Google Drive	Dropbox
Maximum File Size	No Limits (100GB+ Free)	2 GB (Free tier cap)	15 GB (Shared total)	2 GB (Free tier)
Experience	Instant direct transfer for any device	Upload link / wait for email	Upload to drive & share link	Upload to cloud & share
Cloud Server Storage	100% Private (0 Bytes Stored)	Stored 7 days on server	Stored indefinitely	Stored indefinitely
Transfer Encryption	Encrypted direct browser transfer	Server-side decryptable	Server-side decryptable	Server-side decryptable
Account or App Needed	None (Instant 1-Click Code)	Email verification required	Google Account required	Dropbox Account required
Cost for 50GB Transfer	100% Free Forever	$12 / month (Pro)	$2.99 / month (Google One)	$11.99 / month (Plus)

Industry Solutions

Engineered for unlimited files

From 100GB video timelines to private legal audits, ButterShare beams what legacy cloud uploaders choke on.

Multi-Gigabyte Video

Video Editors & Filmmakers

Stream massive 50GB–200GB raw footage batches directly to colorists and directors with zero upload queues or cloud penalty fees.

ProRes 4444, 8K B-Roll, MKV, DaVinci Resolve

3D & Game Builds

Game Devs & 3D Artists

Send game builds, textured environment files, and animation rigs instantly. Connections max out local network bandwidth at gigabit speeds.

Unreal Engine 5 assets, Blender .blend, Unity, FBX

DevOps & SysAdmin

Developers & DevOps

Share complete database snapshots and container images between machines with bit-level integrity and zero cloud intermediate footprint.

PostgreSQL dumps, Docker .tar, Linux ISOs

Lossless Audio Stems

Music Producers & Audio

Collaborate on album masters and stem packages with fellow musicians and engineers with pure bit-for-bit fidelity and zero file size ceiling.

24-bit 96kHz WAV, Ableton, Logic sessions

Fully Secure Privacy

Legal & Enterprise Confidential

When privacy matters, ButterShare avoids third-party cloud file storage and transfers through an encrypted browser connection.

NDA blueprints, financial audits, M&A vaults

Memory & Disk

Native Direct Disk Streaming

Files stream directly from storage into browser data pipelines. Incoming chunks write directly to disk with zero RAM overload or crashes.

Multi-gigabyte memory safety architecture

Local Line Speed

Instant Local Gigabit Transfer

When both devices share the same Wi-Fi or office network, data routes directly through your local router at internal gigabit rates without internet data.

Up to 1,000 Mbps local network throughput

Real World Stories

Loved by people with heavy files

From filmmakers and developers to researchers and everyday friends sending home videos.

“WeTransfer wanted $12/month because my ProRes export was 14GB. With ButterShare, I gave the director a 6-letter room code and it transferred across town at 450Mbps. Game changer.”

Alex Rivera

Independent Colorist & DP • Freelance

“Our lab compliance forbids uploading unanonymized sequencing datasets to commercial cloud drives. ButterShare's zero-knowledge direct device-to-device transfer passed all our privacy requirements.”

Dr. Elena Rostova

Genomics Researcher • University Lab

“Transferring 40GB Unreal Engine builds between my MacBook and our Windows QA tester used to require a physical USB stick or hours of waiting. Now we just beam it in a browser tab.”

Marcus Vance

Lead Game Developer • Indie Studio

Frequently Asked Questions

Got questions? We've got answers

Everything you need to know about device-to-device transfers, security, file sizes, and device compatibility.

Send Any File, Any Size, Any Device

No cloud storage. Beam your file now.

Ditch the 2GB WeTransfer limits and monthly cloud fees. Send files directly between iPhone, Android, Mac, and Windows with zero accounts and zero server storage.

No 2GB File Limits

100% Private (0 Bytes Stored)

Every Device & Browser