Name: yayoik (the k is my family name's initial)
Work: web designer
I have been making things from home since the Windows 98 days. This domain is a playground I set up for working with AI — mostly Claude Opus and GPT-6 Astra. I build the things I want for myself. I did wonder whether something good might turn into a living, but so far: not a chance! I would be glad if you made free use of them.

What I make

Chrome extensions, and an assortment of web apps that run in the browser alone.

• Disc Art Window — shows the playing track's album art in the corner of the Spotify Web Player, with a "CD shelf" of everything you have heard.
• Tsukimado — press the crescent in your toolbar and tonight's moon rises in a small window, with its traditional Japanese name and the dates of the next new and full moon.
• Isshu — a meditation timer that measures your sitting with a single stick of incense. The stick's length changes to match the time you chose.
• Image Info Mini — an inspection tool for people who build the web: missing alt text, image dimensions, and the causes of layout shift, all at a glance.

Policy

• Collect nothing that is not needed.
  Whatever an extension reads stays inside your own browser. It is never sent to an outside server, and no one outside can see it. Using an extension from this site will not let your Spotify listening data, or anything like it, leak out.
• Stay out of the way.
  Not interrupting your work, sitting small in a corner of the screen, appearing only when you want it — those are what I care about. There are no accounts either.

The privacy policy has the details.

About this site

The button at the top right switches between Japanese and English. There is analytics here so I can see how many people visit, never to identify anyone.

Contact and support

For thoughts, impressions or work enquiries, please use the contact form, or write to hello@yayoik.jp.

Everything here is free.
If you like it, a little support through OFUSE or Buy Me a Coffee lets me keep the AI running that much harder.