Everything in the catalog

Flowchart and diagram editor that saves to your device or cloud drive and exports PNG, SVG or PDF.

Paste or upload a table and map columns to many chart types to export vector graphics.

Runs a small GPT-2 model in the page and shows attention and token probabilities as it generates text.

Reformats minified or messy JavaScript, HTML and CSS with indentation settings.

Creates a .gitignore file from templates for operating systems, IDEs and languages.

Tetris implemented with React, playable with keyboard and with a pause feature.

Cheat sheet of easing functions with previews and ready-to-use CSS values.

Demo page for the PathFinding.js library: pick an algorithm, place walls and animate the search.

Zero-knowledge pastebin where text is encrypted in the browser before being stored, with expiry options.

Non-linear personal notebook that runs as a single HTML file.

Browser chat interface for the OpenAI API with prompt library, folders and local history; bring your own key.

Two-pane Markdown writer showing a live preview, with HTML and PDF export.

Disassembles an uploaded .wasm module into readable WebAssembly text.

Assembles WebAssembly text format to a binary module and runs the JavaScript harness.

Turns a curl command into equivalent request code in many programming languages.

Converts raster images into SVG vector graphics, running in the browser per the page.

End-to-end encrypted office suite with rich text, spreadsheets and polls, usable without an account.

Recreation of classic Microsoft Paint that runs in the browser and saves images to your device.

Transform, prefix and minify CSS against chosen browser targets in the browser.

Fast search across Iconify icon sets with copy as SVG, JSX or Vue.

Game that teaches CSS flexbox by moving frogs onto lily pads with code.

Makes a printable card with a QR code and credentials so guests can join your Wi-Fi.

Describe an app idea and an open model generates a runnable code project with a preview.

Web notes app for developers with Markdown, categories and local browser storage.