Dukto Link

Move files between your devices over the local network. No accounts, no cloud, no setup.

Dukto Link is the iOS edition of Dukto, the cross-platform LAN transfer tool created by Emanuele Colombo. Open it next to Dukto on a Mac, Windows, Linux or Android machine on the same network, pick what you want to send, tap the buddy it should reach, and it goes straight across — the files never touch a server.

This repository is the support home for the app. Found a bug or have a question? Open an issue — that’s the fastest way to reach me.

Buddies on the network Recent transfers Settings

Getting started

Install Dukto on the other device (see Dukto for your computer below).
Put both devices on the same Wi-Fi network.
Open Dukto Link. When iOS asks for permission to find devices on your local network, allow it — without it your buddies can’t be discovered.
Tap a buddy and choose what to send: text, the clipboard, files, a folder, or photos and videos.

Receiving works the same way in reverse. You decide where things land: a folder of your choice, or straight into your photo library for media. Set a default in Settings and Dukto Link stops asking.

Dukto for your computer

Dukto Link talks to any Dukto client. Grab the latest desktop and Android builds from the Dukto releases page.

Troubleshooting

No buddies show up. Both devices need to be on the same network and the same network segment. Automatic discovery is broadcast-based, so a router, a guest network, or client isolation on the access point will hide your buddies even when both devices have internet. Check that:

iOS granted the local network permission — Settings › Dukto Link › Local Network
Both devices are on the same Wi-Fi (not one on Wi-Fi and one on cellular)
The desktop client’s firewall allows Dukto on port 4644 (TCP and UDP)
VPNs are off, on both ends — they routinely break LAN discovery

Still nothing? Send to an address directly. Tap IP connection on the buddies screen and type the other device’s IP address. This skips discovery entirely and works across segments, as long as the two machines can reach each other. NAT and firewall traversal isn’t guaranteed.

A transfer stopped partway. Whatever arrived is kept, and the entry is marked in Recent. If you were the sender, tap it and choose Retry to send it again.

Transfers stop when I leave the app. iOS gives an app only a short window to finish work in the background. Big transfers need Dukto Link on screen; if the system suspends the app first, the transfer is cancelled cleanly and shows up in Recent so you can retry it.

Where did my received files go? Wherever you chose. Files go to the folder set in Settings › Received files, and photos and videos to the folder — or the photo library — set under Received media. Tapping a row in Recent opens the item.

Privacy

Dukto Link collects nothing. No analytics, no accounts, no tracking, no third-party SDKs, and no server in the middle — your files go straight from one device to the other. The full policy is here: Privacy Policy.

Security

Dukto Link is built for networks you trust. Like the original Dukto, transfers are not encrypted and there’s no authentication beyond you choosing who to send to, so treat it as a tool for your home or office network rather than for public Wi-Fi. Nothing is ever sent without your explicit action.

Support

Open an issue for bugs, questions and feature ideas. You’ll need a free GitHub account to post one.

When reporting a problem, it helps to include your iPhone and iOS version, the Dukto Link version from Settings › About, and what the other device is running.

Credits

Dukto was created by Emanuele Colombo and is kept alive across platforms by the community. Dukto Link is an independent iOS edition, built from scratch in Swift and wire-compatible with the original protocol. It is free, and it stays free.