Artifacts

Catalan rewriting assistant: click a word or select text to see spelling checks and synonym alternatives from an offline thesaurus.

Write Markdown in one pane and see it rendered live, jump around via a heading outline, and open or save .md files.

Fetches a site's pages and assets and rates how likely it was built with AI app builders like v0, Bolt, Cursor or Lovable.

Cuts a section out of a video and saves it as GIF, WebP or MP4, with controls for frame rate and output size.

Portuguese-language tool that turns a photo into a duotone halftone avatar or text banner.

Upload a floor plan image, set its scale, then trace areas to get a digital takeoff of room sizes.

Painting canvas that imitates how wet watercolour strokes spread and blend, built with Claude.

A local-first block notes app with nested pages, templates and an optional AI assistant using a key you supply.

List tasks with a duration each, run them in order, and get an alert when each time is up.

Opens Blender .blend files from a URL or GitHub link and shows the meshes, curves and text with orbit controls.

Extracts text from PDFs and images with Tesseract.js; the page says files stay in your browser.

Runs prompts against the language model built into Chrome, downloading it on first use.

Saves pasted clipboard content in several formats (text, HTML, RTF, images) so you can keep or download it.

Shrinks animated GIFs with gifsicle running in WebAssembly, from lossless to aggressive presets.

Renders DOT graph source as SVG as you type and stores the graph in the URL fragment for sharing.

Generates several resized and recompressed versions of one image so you can pick the smallest file that still looks fine.

Drop in a picture or use the webcam and a CLIP model run by Transformers.js says whether a bird is in it.

Boots a small Linux image through the v86 x86 emulator so you can run shell commands in a tab.

Renders Mermaid flowcharts and sequence diagrams as Unicode box-drawing text using a WebAssembly library.

Renders Mermaid flowchart and sequence diagrams as terminal-style Unicode box art in the browser.

Runs MicroPython in WebAssembly and stores the code in the URL so snippets are easy to share.

Executes ES5-style JavaScript in a small WebAssembly engine and keeps the code in the page address.

A Minesweeper clone with three difficulty levels, flagging, a timer and long-press support on phones.

Five guided NumPy exercises plus a free playground, all running Python in the page through Pyodide.