Top 5 Chrome Extensions for AI Users in 2025
Discover the 5 best Chrome extensions to supercharge your AI workflow — from web data extraction to automation.
Working with AI is now mainstream, but few people know how to leverage the right browser tools to multiply their productivity. Chrome extensions are the most powerful layer — they work directly inside your browser, no complex app installs needed.
Here are the 5 extensions I use every single day, ranked by how indispensable they are.
1. Web2Markdown – Clean Web Data for AI
Best for: AI developers, researchers, content creators
The core problem when working with AI: you can’t feed raw HTML to ChatGPT or Claude. These models burn thousands of tokens just parsing <div>, <span>, and inline scripts — instead of focusing on the actual content.
Web2Markdown solves exactly that.
Key Features
- One-click conversion: Hit a button, the entire page becomes clean Markdown
- Selection export: Highlight any section, export just that — no noise
- YAML Frontmatter: Automatically adds metadata (title, url, date) to every exported file
- Context menu: Right-click any page → Copy as Markdown
Before/After Comparison
BEFORE (raw HTML):
<div class="article-body" data-track="...">
<h1 class="title__heading">Article Title</h1>
<p class="body-text font-regular">Content here...</p>
</div>
→ ~150 tokens
AFTER (Markdown):
# Article Title
Content here...
→ ~20 tokens~87% token savings for the same content.
Pro Version
Batch export multiple URLs, sync to Notion/Obsidian, send via Webhook. Ideal if you’re building data pipelines for AI agents.
2. Sider – Multi-Model AI Sidebar
Chat with Claude, GPT-4, and Gemini directly in your browser without switching tabs. Sider appears as a sidebar, letting you ask questions about the page you’re reading.
Strengths: Multiple AI models in one UI, clean interface. Weaknesses: Requires subscription for full features.
3. Glasp – Highlight & Summarize Web Pages
Highlight text directly on any website, automatically create notes, and sync to the cloud. Glasp also has AI summarization for YouTube videos and long articles.
Best for: Researchers and students who need organized knowledge management.
4. Merlin – AI Assistant for Every Website
Merlin works on any page — YouTube, Gmail, Twitter — letting you summarize, translate, or write replies using just Cmd+M.
Highlight: Supports GPT-4, Claude, and Gemini in the same interface.
5. Monica – All-in-One AI Copilot
Monica combines AI chatbot, writing assistant, and translation tool. It excels at writing emails, summarizing PDFs, and context-aware translation.
Overview Comparison
| Extension | Core Feature | Price | Best For |
|---|---|---|---|
| Web2Markdown | Web → Markdown, Batch export | Free / $9/mo | AI dev, data collection |
| Sider | AI sidebar, multi-model | Free / $8/mo | Daily AI usage |
| Glasp | Highlights, note-taking | Free | Researchers |
| Merlin | Keyboard shortcut AI | Free / $14/mo | Power users |
| Monica | All-in-one copilot | Free / $9/mo | General productivity |
Conclusion
If you can only choose one extension from this list, pick Web2Markdown. It solves the most fundamental problem: feeding clean, structured data to your AI.
The other extensions add capabilities on top, but without clean input data, even the best AI model can’t perform at full capacity.
Using another extension not on this list? Share it in the comments!