Labelarium: I kept losing one sheet of paper, so I built an app

Labelarium is on Product Hunt today, and on Peerlist this week. It’s free and open source, and it started with a sheet of paper.

Here it is in 30 seconds:

The sheet of paper

I have a Brother P-touch PT-D220 label maker. Its symbols and frames are buried in menus on the device, and the quick way to find one is a single paper sheet with all 649 symbols on it. I kept losing that sheet, and the fallback was going through the PDF manual every time I wanted a good label.

So in September I made a companion app for myself. It’s a PWA, it works completely offline once installed, and it’s open source. I also added the most popular models from Reddit, from DYMO, NIIMBOT, Brady and Phomemo, for ten models in total.

Of course, the first label I printed with it was for the chaat masala dispenser.

Label number one. Priorities.

What it does

It lives at labelarium.com. For the PT-D220, all 649 symbols are indexed across 30 categories. Search “do not enter” and you get the symbol and the exact keys to press on your model.

There’s also a label designer: you type your text, pick a real tape width and colour, and it gives you a step-by-step recipe of key presses that you tick off as you go.

The ten supported models, and the recipe for one label.

Under the hood

It’s plain HTML, CSS and JavaScript with no dependencies, plus a service worker for offline use, hosted on GitHub Pages. The code is under AGPL-3.0.

Building with agents

Building with agents still feels unreal: hit an annoying problem, use the fix an hour later, then keep making it better.

If you have a label maker that isn’t in Labelarium yet, tell me which one I should add next.

Made a companion app for myself to help me print good labels without always going through PDF manual via my Brother PT-D220 label maker! Added top 10 popular models from reddit as well for dymo, niimbot, brady and phomemo. PWA. Works completely offline once installed. Open…

@jatinkrmalik, 12 September 2026

building with agents still feels unreal. hit an annoying problem, use the fix an hour later, then keep making it better my p-touch has 649 symbols indexed on one paper sheet i kept losing. now "do not enter" finds the sign and the exact keys

@jatinkrmalik, 3 November 2026

on product hunt today: and on peerlist this week: free and open source: which label maker should i add next?

@jatinkrmalik, 3 November 2026

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jatinkrmalik/labelarium A companion app for label makers: find any symbol and get the exact keys to press. A PWA that works offline, with no dependencies. JavaScript AGPL-3.0 ★ 2 View on GitHub →