Everything in the catalog

Guided tour of Glicol, a graph-based language for live coding music that runs in the browser.

Image optimizer that shrinks files in the browser, works offline and keeps images on the device.

Creates a link to a secret message that can be opened only once.

Designs QR codes with custom dot shapes, colors and a center logo, then exports them as images.

Online EPUB reader with highlighting, search and themes.

Build branching interactive stories visually as linked passages; works in the browser and exports to HTML.

Format SQL for many dialects with configurable indentation and keyword case.

Draw UML-style class and component diagrams from a compact text syntax with instant preview.

Draws a PostgreSQL EXPLAIN JSON plan as a tree with cost and time per node.

Minimal offline-first HTTP client for the web that organizes requests into collections.

Suggests postgresql.conf settings for given hardware, PostgreSQL version and workload type.

Shared drawing board where anyone with the link can sketch together, no sign-up.

Packs SVG parts tightly onto a sheet to cut material waste for laser, CNC and plasma cutting.

Probes browser APIs to expose fingerprinting signals and detect spoofing or privacy tools.

Online book with live demos of Bezier curve math, splitting, offsetting and intersection.

Browser word cloud generator that lays out the most frequent terms of pasted text on a canvas.

Rebuilds an image as pure CSS box-shadows that you can paste into a stylesheet.

Collection of 180 gradients with CSS code and PNG downloads.

Drag-and-drop preview for glTF 2.0 models using three.js.

Open-source page audit that tests front-end quality and performance issues in a page.

Turns an uploaded document image into structured Markdown using a vision model.

QR code generator for URLs, text, Wi-Fi and vCards with styling options and a scanner.

Hear arpeggios by turning chords into running notes, and see their shapes on screen.

Explore how chords are built and move between them, with colors and sound, using simple controls.