GoodExts

GoodExts is an independent collection of free Google Chrome extensions and practical tools built for people who spend their working day on X (Twitter) and in AI-assisted workflows. It is maintained by indie developer wangsen2020 and is aimed at solo founders, developers and operations teams who want to spend less time on repetitive tasks and more time on their products and customers.

The extension lineup focuses on doing one job well. X Video Downloader saves videos from X posts. X Article to PDF exports long X articles to clean PDF files for reading, archiving or sharing. X Blocker helps you detect and manage unwanted content in your timeline. XZoom, an open-source extension, lets you zoom into photos and read tall screenshots without leaving the page. Each extension works independently, so you can install only what you need.

Alongside the extensions, GoodExts publishes AgentRelay, a free Windows 10/11 service that runs on your own computer and connects compatible extensions, apps and web workflows to the AI clients you already use — Codex, Grok Bot and Antigravity. Instead of setting up a separate API key in every tool, you choose a conversation that is already prepared with your project instructions and keep reusing it. AgentRelay is free; the capabilities and allowances of each AI client follow that provider's own plans and terms. GoodExts is transparent about limits: AgentRelay does not make AI accounts unlimited or guarantee offline inference.

For heavier X operations, XFollower is a workspace extension that integrates with AgentRelay for AI-assisted tasks such as understanding and drafting, while fixed page actions stay in code for predictable, reviewable results.

The site also hosts practical guides, such as how to view Twitter images at original size, how to install XZoom, and how to think about AI subscriptions versus API billing. GoodExts is available in English, Simplified Chinese, Brazilian Portuguese and Latin American Spanish.

If you want useful, focused browser tools without subscriptions — and a simple way to connect them to your existing AI plan — GoodExts is a good place to start.