The most useful AI tools are the ones you do not have to think about using. Browser extensions put AI directly into your workflow — no tab switching, no copy-pasting. Here are the 12 extensions worth installing.
Productivity
1. Grammarly — Writing Assistant Everywhere
Grammarly checks your writing across every text field on the web — Gmail, LinkedIn, Twitter, Google Docs, Slack. The AI suggestions go beyond grammar: tone adjustment, clarity improvements, and full sentence rewrites. It is the single most useful browser extension for anyone who writes.
2. Sider — ChatGPT/Claude in Any Tab
Sider adds a sidebar with AI chat (Claude, GPT, Gemini) to any webpage. Highlight text and ask AI to explain, summarize, translate, or rewrite it. For researchers, students, and anyone who reads a lot online, it eliminates constant tab-switching to AI tools.
3. Merlin — AI Shortcuts
Merlin provides quick AI actions via keyboard shortcut on any website. Press Ctrl+M to summarize a page, generate a reply to an email, or ask a question about the content you are viewing. The speed of access makes it useful for tasks too small to justify opening a separate AI tool.
Research
4. Perplexity Extension — Search Any Page
The Perplexity extension lets you ask questions about the page you are viewing, search for related information, and get cited answers without leaving the tab. Particularly useful when reading articles and wanting to verify claims or dig deeper into specific points.
5. Scholarcy — Academic Paper Summarizer
Scholarcy summarizes academic papers into structured flashcards: key findings, methodology, limitations, and references. For students and researchers reading dozens of papers, it cuts reading time by 70% while capturing the essential information.
Writing
6. Compose AI — Email Autocomplete
Compose AI predicts and autocompletes your sentences as you type emails. It learns your writing style and suggests completions that sound like you. For people who write dozens of emails daily, the time savings compound quickly.
7. QuillBot Extension — Paraphrase Anywhere
Highlight any text on the web and QuillBot rewrites it in your chosen style: standard, fluency, formal, creative, or concise. Essential for students and writers who need to paraphrase sources accurately.
Reading
8. TLDR This — Page Summarizer
One click summarizes any article into key points. For news readers, researchers, and anyone with more tabs open than time to read them, TLDR This extracts the essential information without the filler.
9. Immersive Translate — Bilingual Reading
Immersive Translate shows the original text alongside the translation, paragraph by paragraph. Unlike full-page translation that replaces the original, this side-by-side view lets you learn the language while understanding the content. Supports 30+ languages.
Work
10. Tactiq — Meeting Transcription
Tactiq transcribes Google Meet, Zoom (in browser), and Teams meetings in real time. The transcript appears in a sidebar during the meeting, and AI generates a summary with action items afterward. No bot joins the call — it works directly in the browser.
11. Magical — Text Expansion + AI
Magical combines text expansion (type shortcuts that expand into full templates) with AI personalization. Create a template for sales outreach, and Magical personalizes it for each prospect using data from the page you are viewing. For sales and recruiting, it automates repetitive messaging without sounding automated.
12. Monica — All-in-One AI Assistant
Monica provides a comprehensive AI sidebar with chat (multiple models), page summary, translation, image generation, and writing assistance. If you want one extension instead of several specialized ones, Monica covers the most ground.
Installation Advice
Do not install all 12 — that will slow your browser and create conflicts. Pick 3-4 that match your primary workflow. A good starting combination: Grammarly (writing) + Perplexity (research) + TLDR This (reading) + one work-specific tool.