Workflow
A/B testing, end to end.
Plan the bar before launch, read the lift after the run, and review trust before you ship.
Related writing: building an ad experiment platformSmall tools, built for real problems.
Each one started as something I needed at work or at home. They run entirely in your browser, keep no accounts, and send nothing to a server. Three of them form a complete A/B testing workflow.
Experimentation
Plan, analyze, reviewEngineering utilities
Small helpers for the work between the commits.PKCE Generator
Generate a code verifier and S256 code challenge for an OAuth 2.0 authorization flow.
Read: OAuth 2.0 with PKCETerminal Paste Cleaner
Remove accidental line breaks, indentation, or every whitespace character from text copied out of a terminal.
AI Productivity Stack Builder
Assemble the AI tools you actually use into a clear, shareable workflow card.
Series: my toolchain over the years
Everyday planning
Calculators and companions for life outside the editor.Timezone Meeting Planner
Score every hour of the day across China, US West, India, and anywhere else on the call.
Mortgage Payoff Visualizer
Follow principal, interest, and the remaining balance from the first payment to the last.
Snooker Scorekeeper
Call out two-player scores in Chinese, track frames, and correct the table by touch.