Discover how NitroFTP eliminates per-stream TCP bandwidth throttling across dedicated servers, Seedboxes, NAS, and Cloud Object Storage without modifying your Windows system settings.
Instead of transferring a 50 GB file over a single TCP channel, NitroFTP virtually splits the file into independent segments downloaded or uploaded simultaneously via REST + RETR/STOR (FTP/FTPS) or offset seek (SFTP).
Across the internet, some TCP routes are slower than others. As soon as a fast stream finishes its segment, it inspects the longest remaining segment and splits it in half on the fly so all workers finish together.
Zero tail-end transfer waitMost clients apply SO_RCVBUF and SO_SNDBUF after opening the connection—too late for the TCP Window Scale option. NitroFTP configures socket buffers before the initial SYN handshake.
NitroBoost starts conservatively and opens additional connections only while aggregate throughput improves by at least +5%. It also remembers each server's 421 Too many connections limit.
Acceleration isn't limited to downloads: NitroFTP automatically probes remote server compatibility and activates parallel segmented upload to push your backups and 4K videos at full speed.
High-Speed Parallel Upload.nitropart ResumeThe exact byte progress of every segment is saved in real time inside a JSON state file paired with the temporary .nitropart file. In case of power loss or Wi-Fi/Fiber drop, not a single megabyte is lost.
Modern secure servers like vsftpd and FileZilla Server reject FTPS data connections that do not reuse the control channel's TLS session. NitroFTP natively handles TLS Session Resumption across all 32 streams.
Automatic on-the-fly MODE Z (zlib) compression for text, SQL, logs, and source code, combined with low-level Windows TCP Keep-Alive (SIO_KEEPALIVE_VALS) preventing NAT routers from dropping the control channel.
Credentials stored in the Site Manager are encrypted using the Windows hardware-backed cryptographic API (DPAPI). TLS certificates and SSH host keys are verified via TOFU with instant MITM alerts.
Hardware secret protectionStop juggling between FileZilla, WinSCP, Cyberduck, and AWS S3 explorers: NitroFTP unifies all your environments into one ultra-fast interface.
| Protocol | Encryption & Authentication | NitroBoost Acceleration | Primary Use Cases |
|---|---|---|---|
| Standard FTP | Classic authentication (Passive / Active) | ✔ Up to 32 streams (REST + RETR/STOR) | Dedicated servers, shared hosting, local NAS |
| Explicit & Implicit FTPS | TLS 1.2 / TLS 1.3 + TLS Session Reuse (PROT P) | ✔ Up to 32 TLS-encrypted streams | Seedboxes, vsftpd, FileZilla Server, enterprise servers |
| SFTP (SSH File Transfer) | SSH2 (Password + Ed25519 / RSA / ECDSA Private Keys) | ✔ Multi-channel SSH & Parallel Offset Read/Write | Linux servers, VPS, DevOps, Cloud production |
| SCP (Secure Copy) | Native SSH2 | ✔ Fast parallel transfers | Network appliances, routers, Unix hosts |
| Amazon S3 / Cloudflare R2 / MinIO / Wasabi / OVH | AWS Signature v4 (Access Key / Secret Key / Custom Endpoint) | ✔ Parallel Range Download & Multipart Upload | Cloud backups, CDNs, 4K media, S3 archival |
| Azure Blob Storage | Azure Account Key / SAS Token / HTTPS | ✔ High-speed parallel Block Blob | Microsoft Azure & Enterprise infrastructures |
| WebDAV & WebDAVS | HTTP / HTTPS (Basic & Digest Auth) | ✔ Parallel HTTP Range requests | Nextcloud, ownCloud, Synology, Storage Boxes |
| SMB / CIFS | Windows Authentication / Samba v2 & v3 | ✔ Multi-block parallel Read/Write | Windows servers, Synology/QNAP NAS, LAN/VPN |
| SOCKS5 & HTTP CONNECT Proxy | With or without user authentication | ✔ Compatible with all NitroBoost streams | Corporate firewall traversal & dedicated routing |