testy.cool
Tool
Prompt Field Notes
Context-specific prompting observations. What worked, when it applies, and why. Copy as markdown or XML.
LLMPrompting
OpenTools
Tools, a few tool-backed tutorials, and some browser extensions.
5 tools1 tutorial2 extensions
Tool
N-gram Viewer & Phrase Frames
Paste text, get n-gram frequencies plus phrase frames — n-grams with one variable slot so variants collapse into one entry.
TextLinguisticsNLP
Open
Tool
LLM Price Calculator
Calculator for checking API costs across Claude, GPT, and Gemini, including prompt caching.
LLMAPIPricing
Open
Tool
Channel Pantry
Analyze a YouTube cooking channel to see what ingredients they use most.
YouTubeAICooking
Open
Tutorial
CSS Clamp Calculator
Clamp() calculator plus the tutorial explaining the math behind it.
CSSResponsiveTutorial
Open
Tool
Video Breakdown
Paste a YouTube URL. AI watches the video and writes a scroll-synced text breakdown.
YouTubeAI
Open
Extension
ChatGPT Conversation Exporter
Browser extension for exporting one ChatGPT conversation to Markdown or HTML.
ChromeExport
Open
Extension
Hacker News Enhancement Suite
Manifest V3 fork of HNES with collapsible comments, keyboard shortcuts, and user tags.
ChromeHacker News
Open