Artifacts

Generates typed models in many languages from JSON, JSON Schema or GraphQL samples.

Public HTTP request and response service for testing clients, with endpoints for headers, status codes and delays.

Sliding tile puzzle where matching numbers merge until you reach 2048.

Markdown editor with themes tuned for WeChat articles, copying rendered output with styles.

Drag-and-drop recipe builder that chains hundreds of operations for encoding, encryption, compression and data analysis.

Official PlantUML web server where you type UML text and get the rendered diagram with shareable URL.

Paste Markdown headings and lists and get an interactive mind map you can export.

Train a tiny neural network on toy datasets in the browser and watch the decision boundary form.

Sprite and pixel-art editor with animation frames, exporting GIF, PNG sprite sheets and more.

Web mind map editor with many layouts, themes and export options; interface is in Chinese.

Load CSV, GeoJSON or other geodata and explore it as layered maps with filters and time playback.

Browser front end for story writing and chat that can use the AI Horde, KoboldCpp or other API backends.

Playground for a plugin-based WYSIWYG Markdown editor, useful to test the editing experience before embedding.

Sends files and text between devices on the same network or via a room code, with no signup.

Demos of neural networks trained directly in JavaScript for classification, regression and more.

Browses JSON through a clean viewer with previews for values such as dates, colours and images.

Browser-based PDF toolbox for merging, splitting, compressing, converting and editing without server uploads.

Builds and tests JavaScript or PCRE regular expressions with live highlighting, contextual help and a searchable community library.

Peer-to-peer file transfer that gives you a link; the data goes straight from sender to receiver.

Demo of the UAParser.js library that detects browser, engine, OS, device and CPU from a user-agent string.

Design avatars with several illustrated styles and export SVG or PNG.

Resume builder and parser that works locally in the browser, no sign-up, exporting a PDF.

Draw BPMN 2.0 business process diagrams in the browser and export the XML.

Reports the install and bundle size cost of an npm package.