Everything in the catalog

Turns a video clip into an animated GIF.

Stamps a text watermark onto one or more images.

Adds a chosen prefix and suffix around every list item.

Creates a placeholder SVG image of a chosen size, colour and label for mockups.

Sourdough workbench with a baker's percentage calculator, levain builder and bake schedule, saved in your browser.

Checks fish tank stocking by bioload and also suggests heater size, filter flow and water change schedule.

Phone-friendly bread dough maths based on baker's percentages for yeast or sourdough loaves.

Kitchen measurement converters: cups to grams per ingredient, recipe resizing and oven temperature scales.

PWA for building a circuit of home exercises and running it with round tracking and countdowns.

One page of kitchen helpers: baker's dough maths, recipe scaling, parallel timers, unit conversion and ingredient swaps.

Shows voltage drop, power loss and maximum run length for a wire gauge in AWG or mm2, copper or aluminium.

Block and JavaScript editor with a simulator for the Adafruit Circuit Playground Express.

Writes TypeScript or JavaScript online, shows emitted JS and type errors, and shares snippets by link.