A fake terminal where kids can type anything and get fun responses. Teaches keyboard familiarity and cause-effect thinking.

A chrome extension to make a single static HTML file of the web page using a WebAssembly port of monolith CLI

Build a Nuxt app into a single HTML file.

make image,marmoset model complimer to a complete html，可做Wallpaper Engine 3d壁纸

A simple, responsive single-page under-construction site built with pure HTML and CSS.

A single HTML file to run JavaScript code. Download index.html and run it offline anytime, anywhere with a browser. Best for running code snippets created by humans or AI.

Multi-brand Instagram carousel and post generator. Single HTML file on Vercel.

Live regex tester with match highlighting and capture groups. Free, works offline.

Interactive Gantt chart timeline editor. Drag-resize tasks, dependencies, progress tracking, PNG export.

Extract color palettes from images. K-means clustering, complementary & analogous schemes.

🐾 OpenClaw — 12 free web tools. No accounts, no tracking, works offline.

Browser-based Set-Cookie header auditor. Grades cookies A–F on hardening attributes (Secure, HttpOnly, SameSite, scoping, prefixes)

Find the best meeting time across time zones. Visual timeline, drag slider, shareable link. Free, no signup.

3D procedural terrain generator. Perlin noise, Three.js, instanced trees, day/night cycle. Run in browser.

Real-time 3D audio visualizer with WebGL. Mic or file input, 6 viz modes, beat detection, color themes.

Page speed analyzer - HTML performance check, optimization tips, security checklist.

Visual .env file editor - multi-environment tabs, diff view, validation, secret masking. No upload.

Free invoice generator that runs entirely in the browser. No signup, no backend, no subscription. 3 templates, 7 currencies, works offline.

Data format converter - CSV/JSON/YAML/XML/TOML/Markdown table, auto-detect, instant conversion.

JWT token debugger - decode, encode, verify signature. All local, no server.