After I finish a stringing job, I usually stick a label on the racket with some info.
So I made a simple website for stringing info.

For stringers: QR-code labels look more “premium”, and you can include more details.

For racket owners: you can fill in what you want first, then just send the link to your stringer.

To use it, it’s best if you have a label printer that supports 18mm label tape. A normal printer also works, but it’s a bit more troublesome.

It’s currently in small-scale testing. If you run into any bugs, please leave a comment and let me know. I’ll keep improving it and release it properly later. Thanks!

Link:
https://picotag.cc/

Good idea!
I had a similar idea about ~10? years ago. But I only showed the data, and you couldn't "order" anything. That is a really good idea!

During Covid, I wanted to work on it again, but couldn't find my old code. In Germany, however, we still have the “problem” with the GDPR...

I’ve updated the site to reduce personal-data risk (no real names, clear placeholders/disclaimer, and anonymized racket serial if provided), so it should fit better with privacy expectations in different countries.
Appreciate the feedback!

Yep, the plan is to keep it open-source and put it on GitHub.
I’m still testing and polishing it, so it’s not coming super soon—but I’ll share it once it’s stable. In the meantime, I’d really appreciate everyone’s feedback to help me improve and refine it further.

1. About the tension setting
The tension setting is printed directly on the physical label, so it’s intentionally limited to numeric values only.
The idea behind the tension note is to keep it flexible, allowing users to enter any additional information they want, without forcing a strict format.
That said, I agree it could be a bit confusing, so I’ll think about how to make this clearer through better UI or explanations.

2. Searchable string / racket lists
This is something I already plan to implement, and it will likely be added in a future release (possibly the next version).

3. About providing an API
I probably won’t provide an API.
Since the project will be open-sourced, anyone who needs this kind of integration can deploy their own instance using Cloudflare’s free tier.
This way, there’s no need to run or maintain a traditional server, and everyone can host their own tag website independently.

4. Other suggestions
I think the other ideas are good as well. I’ll take some time to think about which ones make the most sense to include going forward.

5. Privacy / GDPR note
I’ve recently added a delete-password and view-protection feature, which allows data to be protected or removed by the owner.
This should help, at least to some extent, with stricter GDPR requirements, such as those in Germany.

Then maybe two values? And if the second value is empty, there is only 27 lbs written. If the second is set, then 27/29 lbs (for example)?

Maybe I didn't express myself clearly and you misunderstood me.
I meant more that there is an option to put the information of the strung racket directly to the website (via json or similar, authorized via an API key). Just for example: I still using excel and then I can use a macro to push all my details to the website and geht the URL for the QR code or get the image directly. This would enable anyone to easily integrate it, especially nowadays with AI...

About the tension setting
Some stringers use very specific or custom tension setups that don’t always fit a fixed or two-value format.
Because of that, I decided to keep the tension note as a completely free-text field, which provides the maximum flexibility for different stringing habits and personal preferences. Once the project is open-sourced, you’ll also be able to modify it to suit your own needs, but for now the priority is to keep it as flexible as possible.

About QR code generation / integration
I think I understand your idea better now. Since the project is hosted on Cloudflare and doesn’t rely on a traditional backend (like PHP or ASP.NET), the QR code is currently generated on the front end.
One possible approach could be using URL parameters to prefill all fields and even auto-generate the QR code when the page is opened from Excel or another tool. I haven’t fully thought this through yet, and there may be better or cleaner solutions, but it’s definitely something worth exploring.

Searchable string / racket lists
This part has already been implemented. The Pattern, String, Racket model, and Stringer fields now support keyword search and will automatically suggest matching entries.
Next, I plan to add an admin interface to make maintaining and managing these lists easier.

That totally makes sense. Most regular players actually don’t realize how much knowledge and technique goes into proper stringing — there’s a lot going on beneath the surface.

If they scan the QR code and see the details behind the job, it can really change their perception. They may not understand every technical part, but they’ll feel that the stringer is careful, experienced, and genuinely professional.

Thanks to feedback and suggestions from several experienced stringers, the website has recently been updated with some very practical features, including a Remark (notes) field, password protection, and more.

After running for a while and confirming everything is stable, the project will be officially open-sourced and published.

If you don’t want to self-host, you’re also welcome to use it directly as is — the main limitation is that the admin backend won’t be available.

Live site:

GitHub project:

Hi everyone,

PicoTag has been open-source and running for a while now. I recently checked the backend and noticed that almost all PicoTag users seem to be tennis stringers.

That’s actually a bit surprising to me, because PicoTag was originally developed for badminton stringing records.

Badminton strings break more often, and small changes in string type, tension, or pre-stretch can make a big difference in feel. Sometimes players may not remember what string or tension they used last time, so having a QR code on the racket makes it easy to check the previous record.

For stringers, it doesn’t really add much extra work, but it can make the service feel more complete and professional.

PicoTag is open-source and free to use.
You can self-host it, or simply use the official website directly.
Feel free to try it if you are a badminton stringer.

Project:
https://github.com/206cc/PicoTag

Official website:
https://picotag.cc/