this post was submitted on 05 Aug 2026
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101
Decimen Lets You Send Files Through Light, Not a Network (linuxiac.com)
submitted 2 weeks ago* (last edited 2 weeks ago) by new_otters_raft@piefed.ca to c/technology@lemmy.world
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I'm not sure when I'd use this, but its a neat concept

Decimen is an open-source web app that moves files between devices through an animated QR stream, requiring no direct network connection, pairing, account, or native app.

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[–] new_otters_raft@piefed.ca 7 points 2 weeks ago* (last edited 2 weeks ago) (1 children)

I wouldn't use this day to day, but what I found cool was:

  • it doesn't require cables or any additional equipment (including routers, cell towers)
  • it can't be detected by anything, assuming you toss a blanket over the transfer

The downside is that if you wanted to get it truly offline, you would need to have ~~the~~ an app installed on both devices ahead of time, if I understood it correctly. (Edit: bolded bits are new)

It did lead to some fun discussion in this thread :)

[–] ExcessShiv@lemmy.dbzer0.com 6 points 2 weeks ago* (last edited 2 weeks ago) (2 children)

The downside is that you need to have the app installed on both devices ahead of time, if I understood it correctly.

You did not. It's a web application, it even says so in the snippet you used for the post. It runs directly in the browser, no need to install anything.

[–] AnUnusualRelic@lemmy.world 4 points 2 weeks ago

So you need to be connected in order to grab the application. Or you need a local cache (similar to installing the software).

[–] new_otters_raft@piefed.ca 0 points 2 weeks ago

That's my bad for writing it poorly. I meant to say that about the premise of not needing internet, since someone who has internet on both devices might have better ways to transfer the files.

Someone would need to plan ahead and install the PWA (or some compatible tool) in order for this to work