Everything in the catalog

Renders Gerber and drill files of a PCB as layers you can toggle.

Lookup table showing which HTML and CSS features work in common email clients.

Visual CSS clip-path maker with preset shapes and draggable points.

Remaps an image's colors to the Nord theme palette or another chosen palette.

Previews text, background and accent colors on a live website mock-up with font pairings.

Browser slicer for 3D printing plus CAM for CNC mills, lasers and wire EDM.

Builds mailto links with subject, body, cc and bcc filled in and encoded.

Minesweeper played with emoji tiles in the browser.

Large community database of example sentences with translations across many languages.

Runs Go programs in a sandbox and shares them via link.

CHIP-8 assembler and IDE that runs your program in a built-in emulator, with sprite and audio tools.

Visualises tokens for OpenAI models and estimates prompt cost against context limits.

Runs jq filters on JSON in the browser and produces shareable links to the snippet.

Converts JSON to CSV in the browser and states that data is not sent to a server.

Self-hostable web app for signing, reordering and compressing PDFs, solo or with others; UI is French.

Edit Graphviz graphs by clicking and dragging nodes and edges while the DOT source updates alongside.

Draws the dependency tree of npm packages as an interactive graph with size and maintainer data.

Peer-to-peer tool for sharing files, text and screens between devices in the browser.

Interactive 40-pin GPIO reference with add-on boards and pin functions for the Raspberry Pi.

Interactive pin map of the Raspberry Pi Pico showing each pin's functions.

Speedcubing timer with WCA-style scrambles, statistics, many puzzle types and training tools.

Draws an entity-relationship diagram from pasted CREATE TABLE statements, locally in the page.

Write a resume in Markdown and print or save it as an ATS-friendly PDF, with data kept in the browser.

Places screenshots in browser or device frames over backgrounds; the page says it runs in your browser.