Peerino

Name: Peerino — Download free. P2P file sharing
Availability: InStock
Rating: 5 (1 reviews)
Author: Daniele-Tomassoni

Peerino — Free Download. P2P file sharing

Peerino is a desktop application for direct file sharing between two computers, operating without cloud storage, user accounts, or intermediary servers. Files are transferred peer-to-peer using WebRTC technology with end-to-end encryption through DTLS. When a direct connection cannot be established due to symmetric NAT, CGNAT, or corporate firewalls, the application falls back to a TURN relay provided by Cloudflare, which forwards only encrypted traffic. The program operates on a LAN-first principle, meaning same-network transfers complete instantly without consuming relay bandwidth. Available for Windows as an MSI installer, NSIS package, or portable executable, Peerino is distributed as open source software under the AGPL-3.0 license.

★★★★★

5.0(1 ratings)

Download Peerino (Official links)

File size: 4.64 MB

The latest version of Peerino is: 1.0.4

Operating system: Windows

Languages: English

Developer: Daniele-Tomassoni

Price: $0.00 USD (Open Source (AGPL-3.0))

Share via link. This function generates a unique hyperlink that references a specific file selected by the sender. The link is displayed with a copy button for placement into email messages, chat applications, or any other communication channel. The recipient opens the link in a standard web browser and downloads the file directly from the sender's computer through WebRTC streaming. No installation of Peerino is required on the recipient's side. The link contains the filename, file hash, and the sender's peer identifier. The transfer works as long as the sender remains online and the file stays in the shared-folder directory.
Inbox creation. This function produces a link that allows any person to send files to the Peerino user without requiring the sender to install the application. The user clicks Create Inbox, receives a generated link, and distributes it to whoever needs to transmit a file. The external party opens the link in a browser, uploads the file, and the data arrives directly on the user's computer. This mechanism reverses the standard sharing flow and enables inbound transfers from individuals who do not use Peerino.
End-to-end encryption. All WebRTC connections, whether direct LAN, STUN-assisted, or TURN-relayed, employ DTLS encryption for file content. The signaling server observes connection metadata but never accesses plaintext file data. When a TURN relay is utilized, it forwards encrypted traffic only, consuming approximately double bandwidth. WebRTC uses ephemeral self-signed certificates, so peer identity is not verified through a public key infrastructure. The encryption ensures that file content remains protected during transit across the internet.
LAN fallback transfer. When both peers reside on the same local network, Peerino can switch to a plain HTTP transfer mode for maximum speed. This path does not use encryption but never leaves the local network segment. The fallback activates automatically when the application detects that both parties are on the same LAN. This approach eliminates internet round-trips and relay bandwidth consumption for same-network scenarios, delivering the fastest possible transfer rates.
WebRTC peer-to-peer connection. The application attempts to establish a direct peer-to-peer connection between the sender and receiver whenever network conditions permit. This direct path avoids any intermediary server for the actual file data. WebRTC handles NAT traversal through STUN servers when possible. A successful P2P connection provides the lowest latency and highest throughput because data travels directly between the two computers without relay hops.
TURN relay fallback. When network address translation prevents a direct peer-to-peer connection, Peerino routes the encrypted data through a Cloudflare TURN relay. The relay forwards encrypted packets without decrypting them. This fallback ensures connectivity in restrictive network environments such as symmetric NAT, carrier-grade NAT, and corporate firewalls. Files up to 100 MB can be transferred via TURN relay. Larger files require a direct connection. This limit protects the Cloudflare free tier of 1 TB monthly egress.
Integrity verification. Incoming transfers from browser to application undergo SHA-256 hash verification. The sender computes the hash incrementally during transmission, and the receiver compares the computed hash against the expected value. If a mismatch occurs, the transfer is rejected before the file is saved to disk. This mechanism detects corruption or tampering during transit. The hash verification applies to browser-originated transfers and ensures that the received file matches the original byte-for-byte.
Link expiration management. Relay links and inbox links expire after 24 hours from creation. Direct peer-to-peer-to-web links do not have a time-based expiry; they remain functional as long as the sender has the file in the shared-folder directory and Peerino is running. This differentiation gives users control over temporary sharing sessions versus persistent availability. Expired links cannot be used to initiate new transfers, reducing the window of exposure for shared files.
No account requirement. Peerino operates without registration, login, or any form of user authentication. The application does not create user profiles, does not store credentials, and does not require an email address. This design eliminates the need for personal data collection and simplifies the sharing process. Anyone with the application can generate links or create inboxes immediately after installation. The absence of accounts also means no password recovery, no subscription management, and no personal information stored on remote servers.
Minimal metadata exposure. The link generated by Peerino contains only the filename, the file hash, and the sender's peer identifier. No additional metadata about the file content, the sender's identity, or the transfer history is embedded. The signaling server sees connection metadata required to establish the WebRTC session but does not receive file content. This minimal metadata approach reduces the information available to third parties who might observe the link or the signaling traffic.
Windows platform support. Peerino currently operates exclusively on Windows 10 and Windows 11. Distribution formats include an MSI installer, an NSIS installer, and a portable executable. The installer is approximately 5 MB in size. On first run, Windows may display a security warning because the application is unsigned. Users can proceed by clicking More info and then Run anyway. Versions for macOS and Linux are listed in the development roadmap but are not yet available.
Open source licensing. Peerino is released under the AGPL-3.0 license, which grants users the freedom to use, study, modify, and distribute the software. The source code is publicly available for inspection and contribution. The license ensures that derivative works remain under the same terms. No payment, subscription, or account is required to use the full functionality of the application. The open source model provides transparency regarding data handling and security practices.

Peerino was created by developer Daniele Tomassoni. The program has been developed as an open source project under the AGPL-3.0 license. The application is written in JavaScript, utilizing the Electron framework to deliver a desktop application for Windows. The development approach focuses on peer-to-peer architecture, leveraging WebRTC for real-time communication between browsers and desktop clients. The project originated from a need for simple, account-free file sharing that does not rely on cloud storage providers. The codebase is hosted publicly, allowing community contributions and independent security reviews.