Everything in the catalog

Browsable swatch library of traditional Chinese color names with their color values.

Corrupts JPEG data on purpose to create glitch-art versions of a picture.

In-browser, local-first resume maker where you write the resume in Markdown and export a PDF.

Runs the R language entirely in the browser using WebAssembly.

Sketch chiptune melodies in a pattern editor and share them by URL.

Creates avatar images from initials via URL parameters.

Notepad-style calculator where each line is evaluated live, with units, percentages and variables.

Minimal web interface for chatting with models served by Ollama or OpenAI-compatible servers.

Views KiCad schematics and PCB layouts in the browser without installing KiCad.

Batch image compressor that runs in the browser using codecs compiled to WebAssembly.

Canvas-based pixel-art editor that loads palettes from the Lospec palette list.

Minimal flowchart editor for workflow charts, sequence diagrams and database sketches, no registration.

Color schemes for maps and charts, with filters for colorblind safe, print and photocopy options.

Open-source engine and editor for making and playing tile-based puzzle games.

Editor and player for writing tile-based puzzle games in a simple rule language.

Tutorial with live demos for drawing 2D visibility and shadow effects in games.

Tiny game maker for small worlds and stories using pixel rooms, tiles and dialogue.

SQLite playground for debugging and sharing SQL snippets, with the option to load your own data.

Drop in an SQLite file to look at tables and run SQL in the page.

Web version of an arbitrary-precision calculator that understands units, currencies and conversions.

Browser editor that renders Graphviz DOT code into graph images with several layout engines.

Font subsetter that splits CJK and other fonts (otf, ttf, woff2) into smaller chunks to cut web page size.

Bundles, minifies and compresses npm packages in the browser to show gzip and brotli size.

Simple 8-bit CPU simulator in JavaScript where you write assembly and watch registers and memory change.