A collection of single-page HTML utilities. Each tool combines HTML, JavaScript, and CSS in a single file to provide useful functionality. Inspired by Simon Willison's tools collection.
A clean, elegant countdown timer with preset buttons (1, 3, 5 minutes), custom time input, circular progress visualization, and optional sound notification. Features dark mode design and visual alert when time expires.
A JSON pretty-printer and formatter with syntax highlighting. Paste raw JSON to instantly view it in a readable, colorized format.
A quick-reference cheatsheet for tmux keyboard shortcuts and commands, covering sessions, windows, panes, and more.