Tools

llmfit is a CLI/web tool that inspects your machine's CPU, RAM, and GPU/VRAM, then scores which local LLMs will actually run well on that hardware by memory fit, speed, quality, and context length.

GS Quant is Goldman Sachs' open-source Python toolkit for quantitative finance, giving access to the firm's derivatives pricing and risk analytics. Full use of the underlying APIs requires a Goldman Sachs client id and secret, though the toolkit itself is Apache-2.0 licensed.

Deque University's Color Contrast Checker, a free tool that tests a foreground and background color pair against the WCAG contrast ratio requirements. It reports pass or fail for normal text, large text, and graphical objects.

A guide to image sizing and formatting for websites, covering aspect ratios and dimensions for hero images, in-text images, and favicons.

Google's Rich Results Test tool checks whether a public URL's structured data qualifies it for rich results in Search, such as carousels or preview images. It renders the page the way Googlebot does and reports any structured-data errors.

A checklist of page speed optimization techniques covering server configuration, HTML, images, video, fonts, CSS, and JavaScript.

Google's tool for measuring page performance on both mobile and desktop devices, with actionable recommendations.

Convert between data formats — JSON to TypeScript, SVG to JSX, GraphQL schema to TypeScript, and many more transformations.