Addy Osmani

Agent Skills. I packaged how senior engineers build software into skills for AI coding agents.

Material Symbols. I built Google's official icon set for any website or app.

Quicklink. I built a tool that preloads web pages before visitors click them.

Critical. I built a tool that speeds up how fast websites show their first screen.

Workbox. I built tools that make websites work offline and load faster.

Web Quality Skills. I made AI skills that audit websites and suggest performance and accessibility fixes.

Gemini CLI Tips. I wrote a guide with 30 tips for using Gemini CLI as your terminal assistant.

Backbone Fundamentals. I wrote a free book on building organized web applications.

Addy Osmani. I recently worked on AI at Google and want to collaborate on developer tools.

Agent Engineer. I made a course teaching engineers how to build thinking AI assistants.

Say. I built a voice-to-text app that works entirely in your browser.

Agentic SEO. I built a tool that audits whether AI assistants can find and understand your documentation.

Squish. I made a browser tool that compresses batches of images without uploading them anywhere.

Web Vitals Extension. I made a Chrome extension that measures how fast your website actually performs.

BG Remove. I built a free tool that removes image backgrounds without uploading anything.

Basket. I built a tool that saves website files locally so pages load faster.

Chatty. I made private AI chat that runs entirely in your browser.

Lighthouse Plugin. I made a Webpack plugin that automatically audits your website's speed and usability.

Firew0rks. I made a tool that plays text art animations in your terminal.

Git2txt. I made a tool that downloads GitHub projects and combines them into one text file.

Tunnel Bear Login. I built a login form with an animated bear that reacts to your typing.

Video Compress. I made a tool that shrinks videos in your browser.

Jarvis. I built a live AI assistant that talks back through your camera and microphone.

Oust. I built a tool that pulls every link out of a website's code.

ADK Product Engineers. I made five AI assistants that do real product work for non-technical teams.

Enhance. I built an AI tool that fixes and enlarges photos directly in your browser.

Filter. I built a web image editor that works on any device.

Context Buddy. I made a visual prompt builder that teaches you the structure for better AI instructions.

Vanilla JavaScript for React Developers. I wrote a book teaching React developers how to build without frameworks.

Learning JavaScript Design Patterns. I made code examples for learning JavaScript design patterns.

ClipAI. I made a Chrome extension that saves web pages and clips with built-in organization.

Adverse. I built a code reviewer that uses multiple AI agents to catch what one might miss.

UnCSS. I made a tool that removes unused CSS from your website automatically.

Scan. I made a web-based document scanner that turns photos into clean PDFs.

Coverflow. I built a 3D album carousel that spins and reflects like an old iPod.

React Flow. I made a scrolling album cover carousel with smooth animations.

Adaptive Loading. I made a tool that adjusts websites based on device and network speed.

Puppeteer WebPerf. I built a tool that automatically measures website speed and performance.

Memoize. I built a faster way to cache function results and skip repeated work.

Learning JavaScript Design Patterns. I wrote a free book teaching JavaScript design patterns.

Vanilla ES6. I built a to-do app in modern JavaScript that works in Chrome without any build tools.

Catclock. I built a timer and countdown app with smooth animations.

Preact HN. I made Hacker News run faster by swapping in a lighter framework.

Prism. I made a tool that colors code on websites so it's readable.

Polymer Build Kit. I built a build setup for Polymer components with live preview.

CSS Cleaner. I made a tool that removes unused CSS from Sass projects.

getUserMedia. I made camera access work across all browsers with a Flash fallback.

Instagram Query. I made a web component that queries the Instagram API for you.

UnCSS Task. I built a tool that removes unused CSS from your stylesheets.

Critical Weather. I made a weather app that loads faster by prioritizing what you see first.