Free Chrome extensions for X plus AgentRelay, a free local bridge to Codex, Grok Bot and Antigravity.
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What is GoodExts?
Free Chrome extensions for X, plus a local AI bridge
What is GoodExts
GoodExts is an independent collection of free Chrome extensions and tools for people who work on X (Twitter) and in AI-assisted workflows, maintained by indie developer wangsen2020.
AgentRelay
AgentRelay is a free Windows 10/11 local service that connects compatible extensions, apps and web workflows to the AI clients you already use: Codex, Grok Bot and Antigravity. Instead of configuring an API key in every tool, you pick a conversation prepared with your project instructions and keep reusing it. AI client allowances follow each provider's own plans; AgentRelay does not make accounts unlimited or guarantee offline inference.
Free extensions
- X Video Downloader: save videos from X posts
- X Article to PDF: export long X articles to clean PDFs
- X Blocker: detect and manage unwanted timeline content
- XZoom (open source): zoom photos and read tall screenshots
The site is available in English, Chinese, Portuguese and Spanish.
Platforms and languages
GoodExts Availability
Platforms
Languages
Capabilities
GoodExts Key Features
X Video Downloader
Free Chrome extension that saves videos from X (Twitter) posts.
X Article to PDF
Exports long X articles to clean PDF files for reading, archiving or sharing.
X Blocker
Detects and helps manage unwanted content in your X timeline.
XZoom (open source)
Open-source extension to zoom into photos and read tall screenshots in
AgentRelay
Free Windows 10/11 local service connecting compatible extensions and apps to Codex, Grok Bot and Antigravity, reusing existing AI subscriptions without per-tool API keys.
XFollower
X operations workspace extension that integrates with AgentRelay for AI-assisted understanding and drafting; access by contacting the team.
Four languages and guides
Site in English, Chinese, Portuguese and Spanish with practical guides.
Plans and access
GoodExts Pricing
Free
All GoodExts extensions (X Video Downloader, X Article to PDF, X Blocker, XZoom) and AgentRelay are free. AI client subscriptions follow each provider's own plans and terms. XFollower access is by contacting the team.
Common questions
GoodExts FAQs
Is GoodExts free?
Yes. The four X extensions (X Video Downloader, X Article to PDF, X Blocker and XZoom) and AgentRelay are free. AI client subscription costs follow each provider's own terms.
Which AI clients does AgentRelay support?
AgentRelay connects compatible extensions and apps to Codex, Grok Bot and Antigravity.
Does AgentRelay need an API key?
No per-tool API key is needed: it reuses a conversation in an AI client you already subscribe to, prepared with your project instructions.
Which systems does AgentRelay run on?
AgentRelay is a local service for Windows 10/11 x64 that runs on your own computer; the extensions run in Chrome.
Is XZoom open source?
Yes, XZoom is open source at https://github.com/wangsen2020/xzoom.
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