The web, via command line. Type help to start or click in any of the commands bellow to get started.
Tip: press Tab for autocomplete and ↑/↓ for history.
→ A Personal Playground for Developers ←
ioa.fun is my personal collection of command-line tools, terminal games, and interactive experiments — all accessible through a retro-style CLI interface right in your browser.
JSON formatters, encoders, hash generators, SQL builders, and more utilities that save you time during development.
Test your skills with typing tests, reaction games, Snake, Tetris, and unique challenges like drawing perfect circles.
Matrix rain, CRT monitors, glitch effects, and other retro terminal aesthetics to make your browser feel like a command line.
Built for developers, by a developer. This started as a fun side project to explore what's possible when you combine web technologies with terminal aesthetics.
Everything is keyboard-friendly with autocomplete, command history, and shortcuts. No mouse required (but it works great with one too).
Type help to see all available commands, or just start exploring!