Lab
Some ideas are easier to understand by running a few numbers than by reading about them. This is where those small tools live, along with a few experiments I actually ran.
Preregistration Records
Hypotheses, validation plans, and results stay in one public record.
Interactive Demos
Small interactive demos with bilingual page shells and shared demo code.
Traditional Chinese Draft Checker
Paste a Traditional Chinese draft and it flags stray Simplified characters, overlong sentences, and stock AI-style phrases. Your text never leaves the browser.
Reverse DCF Calculator: How Much Growth Is Priced In
Enter price, shares, and free cash flow to back out the growth rate the market is quietly assuming. For education, not a buy or sell call.
SweetVox: Bring the Vocal One Step Forward
Pick a song you own and, right in your browser, push the female vocal forward and the backing track back. Nothing is uploaded.
Leverage Decay: The Index Came Back, You Didn't
Enter daily percentage moves to see what a 2x leveraged product is actually left with. It tracks twice the daily return, not twice the period return.
Volume or Price: What Is That Growth Made Of?
Enter revenue growth and unit-shipment growth to see how much of it came from price. The same 40% can mean two completely different things.
Canvas Particle Waves
A native Canvas animation with scalable particles and wave lines.
Interactive Line Chart
A native SVG line chart powered by built-in sample data.
Source for these tools, and other things built for my own use, lives in Projects.