Simplicity for senders.
Absolute friction-free delivery.
Send files in seconds without forcing clients or colleagues to install software, create accounts, or battle storage limits.
Drop Files & Encrypt In-Browser
Drag and drop individual files or complete folders up to 50GB. When Zero-Knowledge mode is turned on, FastSTNex calls the native Web Cryptography API in your browser to construct a random 256-bit AES-GCM cipher key. Your device encrypts the bytes into unreadable ciphertext before transmitting a single byte across the internet.
Configure Timing, Expiration & Gates
Choose how and when your package should be delivered:
- Send Now: Generates an active instant share link right away.
- Scheduled Release: Seals access until an exact future date, time, and timezone.
- PIN Code: Demands a passcode from the recipient before revealing file streams.
- Lifespan Limits: Choose 24-hour self-destruct, 7 days, or 1-download single use.
High-Speed Concurrent Chunk Streaming
FastSTNex partitions large files into calibrated binary chunks. Up to 3 parallel upload streams execute concurrently with adaptive retry logic. If your Wi-Fi flickers or you change networks mid-upload, transfer resumes from the last confirmed chunk.
Recipient Access & Ephemeral Shredding
Share your link via Slack, email, WhatsApp, or private QR code. When the recipient opens the link, their browser reads the hash fragment to decrypt the payload on their machine. No accounts or software installation required. As soon as the transfer expires or reaches its download cap, disk blocks are zeroed out permanently.