Zero-Knowledge File Transfer

End-to-End
Encrypted Sharing.

FastSend encrypts your files in the browser before they ever touch our servers. Unthrottled, resumable transfers that survive any network condition.

design_v3.fig
assets.zip

Drop files to encrypt & send

AES-256-GCM · Client-side only

Awaiting payload
E2EE Active
Privacy First

Client-Side Cryptography

Your keys, your control. We hold metadata only. Files stay entirely private.

Zero-Knowledge

Encryption happens in your browser. The decryption key lives in your URL fragment — we never receive it.

AES-256-GCM

Military-grade encryption wraps every file chunk in your browser before data ever transits the network.

Self-Destruct Controls

Set expiry windows, cap download counts, or remote-wipe any transfer at any time from your dashboard.

Interactive Demo

See FastSend in Action

Click simulate to watch a secure transfer — from local browser encryption to a shareable link.

1

Select Payload

Browse or drag files to enqueue.

2

Local Encryption

High-speed off-thread AES encryption.

3

Generate Secure Link

Shareable URL with embedded decryption key.

FastSend Transfer Manager

Ready to Encrypt & Send

Click "Simulate Transfer" to begin

project-assets-2026.zip 0%
Preparing payload...

Transfer Secured

File encrypted. Secure link ready to share.

Decryption key lives in the URL hash — never sent to our servers.

Built Different

Zero-Friction Deliveries

Engineered to remove every possible obstacle between you and a secure share.

Bulletproof Resume

Network drops, tab closes, device sleeps — FastSend resumes from the exact byte where it stopped.

Branded Spaces

Pro accounts get custom subdomains and fully branded download pages — your identity, your handoff.

No Size Ceiling

Share multi-gigabyte files at full speed. No artificial throttling, no chunking limits — backed by Cloudflare's global edge.

Pricing

Simple, Clear Value

Every plan includes full end-to-end encryption. No compromise.

Free

$0 / month

For everyday quick shares.

  • Client-side E2EE
  • Resumable Uploads
  • Files up to 5 GB
  • Expiry up to 7 days
Get Started
Most Popular

Pro Space

$8 / month

For designers and professionals.

  • Everything in Free
  • Custom branded subdomain
  • Custom logo & styling
  • Files up to 50 GB
  • Expiry up to 30 days
Go Pro