Tools

Small utilities that do one thing. Like the games, each runs entirely client-side — nothing you feed them leaves your device.

• img: candy-spice.jpg
  Candy Spice Certificate Maker

  Image toolBilingual

  Tsukuba’s soup curry shop candy spice photographs anyone who clears spice level 15 and pins the print to the wall. This makes the same certificate from your own photo — level badge, date, name, and the big red 完食!! stamp — and exports it at L-size 300 dpi, ready to print.

  It finds the faces and shifts the crop so nobody ends up under the date or the badge; about 0.4 s, no upload. Your photo never leaves the browser — a connect-src 'self' policy means the browser itself refuses outbound requests, EXIF and GPS are dropped on import, and even the face detection model is served from the page. Japanese and English.

  Open
• img: plantuml-anywhere.jpg
  PlantUML Anywhere

  VS Code extensionDiagrams

  Open a .puml file and get a live diagram preview — no Java, no Graphviz, no server. The PlantUML engine and its Graphviz layout step both run client-side, compiled to WebAssembly, so it works the same in desktop VS Code and in a browser-based editor like github.dev.

  Not yet on the VS Code Marketplace — install from a local .vsix, or use the standalone Chrome/Brave extension to open .puml files straight off disk. MIT licensed.

  View on GitHub