Tools.keeler.dev
Tiny tools with a clear purpose and a little bit of wonder.
Browser-only tools 100% built and written by AI, guided by a human.
QR Code Creator
Generate QR codes for URLs, WiFi, contacts, and more with your brand logo.
JSON Formatter
Paste unformatted or minified JSON and get beautifully formatted output.
Chromatic Tuner
Tune any instrument with real-time pitch detection and cents display.
Mini Piano
Play an 88-key piano right in your browser with touch and keyboard support.
Days Until Calculator
Count down to important dates with days, weeks, and months.
Random Picker
Can't decide? Input your options and let the dice decide for you.
Sun Angle Compass
Track the sun's azimuth, elevation, and today's insolation curve.
No tools match that criteria
New drops every two weeks
Each tool is intentionally small, focused, and ready to use in the browser.
No heavy frameworks
Just Astro, Tailwind, and small JavaScript libraries when they add delight.
Inspired by Simon Willison
This project draws inspiration from Simon's tools — beautifully simple, focused utilities.