rntxDropmacOS preview

Local network / zero cloud

Send files across the room.Not around the world.

rntxDrop finds nearby computers and transfers files directly over your local network—fast, encrypted, and without an account.

Download for macOSSee how it works
No account TLS 1.3 No telemetry
rntxDrop / Nearby LIVE

Local network

Nearby devices

3 online

MacBook Pro

Niki · macOS · Online

Drop files here

Mac mini

Studio · macOS · Online

ThinkPad

Workshop · Linux · Online

Signed discovery · TLS 1.3No cloud route

Transport

Peer to peer

Identity

Ed25519

Channel

TLS 1.3

Storage

Local only

Built around the network you already have

A file transfer utility designed from the LAN outward.

01/04

Finds the room

Nearby rntxDrop devices appear automatically through local service discovery. No IP addresses or server setup.

02/04

Uses the fast path

Bytes travel directly over Wi-Fi or Ethernet. Your storage and network set the pace—not an upload service.

03/04

Keeps files local

No account, cloud bucket, relay, or telemetry. The normal transfer path never leaves your local network.

04/04

Knows the peer

Persistent device keys, mutual TLS 1.3, full fingerprints, and a session code make identity visible and verifiable.

The whole workflow

Open → drop → done.

No pairing wizard in the normal flow. No destination URL. No password to invent for a one-off transfer.

  1. 1

    Open

    rntxDrop starts listening and announces only the minimum needed to be found.

  2. 2

    Review

    Drop files onto a device, then review the prepared file list, folder contents, recipient and total size before sending.

  3. 3

    Accept

    Unknown devices always ask. Trusted devices can be opted into auto-accept separately.

  4. 4

    Done

    The receiver verifies every byte before the file appears in the download folder.

Assume the Wi-Fi is hostile

Local does not mean trusted.

rntxDrop authenticates the connection, shows who is on the other end, and keeps incomplete or corrupted files out of your Downloads folder.

Block unwanted devices, receive only from trusted peers, open a ten-minute receiving window, or stop every transfer. Archives, hidden content and unknown formats require manual approval even when auto-accept is enabled.

Received content is quarantined on macOS and never opened automatically. Encryption verifies the connection—not whether a file is harmless. This preview has automated security tests, but has not had an independent security audit.

Transfer traceVERIFIED
  1. 00DISCOVERYrouting hint received
  2. 01IDENTITYEd25519 key matched
  3. 02CHANNELmutual TLS 1.3
  4. 03CONSENTreceiver accepted
  5. 04STREAMbounded 1 MiB buffer
  6. 05INTEGRITYSHA-256 matched
  7. 06FINALIZEatomic local commit

GUI when you want it. CLI when you don’t.

Made for desks, labs, and headless boxes.

The native macOS app and CLI use the same portable core. That keeps the protocol consistent across future Windows, Linux, and server clients.

macOS appGo coreCLIFolder manifests
terminal● LAN READY
$ rntxdrop discover --seconds 3
DEVICE           PLATFORM    ADDRESS
Mac-mini         macOS       192.168.1.42
Workshop-Pi      linux       192.168.1.77

$ rntxdrop send --device a13f… ./build.tar
proposal accepted · TLS 1.3
842 MB ━━━━━━━━━━━━ 100%
sha256 verified · complete

Native macOS preview

Your files already have a network. Use it.

Apple silicon · macOS 14 or later · local network permission required. Windows and Linux clients use the same portable core and are next.

Download rntxDrop
0.1.1 preview · not notarizedSHA-256 checksum

Details

Good questions.

Do files touch the internet?+

No. Normal transfers use a direct encrypted connection between devices on the local network.

Can an unknown device send silently?+

No. Unknown devices require an explicit incoming-transfer decision. Trust and auto-accept are separate settings.

What happens if Wi-Fi drops?+

Incomplete files stay in private staging. Compatible peers can resume after a fresh review, with identity and saved-byte verification. Retained partial transfers expire after 24 hours and are subject to storage limits. An uncertain delivery is shown explicitly; retries do not silently start a duplicate transfer.

Does a verified transfer mean a safe file?+

No. A checksum confirms that the file arrived intact, not that it is free of malware. Received content carries macOS quarantine metadata. Do not open unexpected files, even from a familiar device.

Can I use the app and CLI together?+

The desktop app is the sole owner of its running security state. Quit it before using the standalone CLI with the same state directory, so revoked trust and settings cannot be overwritten.

Why a native app?+

Discovery, drag-and-drop, notifications, menu bar presence, and low background overhead should feel like part of the operating system.