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Most AI Chrome extensions are either bloated or do one thing you could do in a free tab anyway. These seven are the exception — tools that actually save time daily, all free to start, and worth keeping installed permanently.
I ran all of these for 30+ days to see which ones stayed in my browser.
TL;DR: Install Grammarly (writing), Perplexity (research), and Tactiq (meetings) and you’ve covered 90% of daily AI needs in the browser. Add Sider AI if you want one multi-model sidebar. Skip everything else unless you have a specific need.
How I Evaluated These
Three criteria: (1) Does it save real time in a typical workday? (2) Is the free tier genuinely useful or a demo? (3) Does it work without annoying interruptions or privacy concerns?
1. Grammarly — Best for Writing
Free tier: Grammar + spelling + basic tone | Paid: $12/month (annual)
Grammarly is the only extension on this list that works everywhere you type — Gmail, Google Docs, LinkedIn, Slack, Twitter, ChatGPT, online forms. The free version catches grammar and spelling errors in real time. Pro adds sentence rewrites, tone adjustment, and a plagiarism checker.
Why it stays installed: It’s invisible when you don’t need it and catches mistakes you wouldn’t notice on your own. For anyone who writes professionally, this is not optional.
→ Full Grammarly Review: Is It Worth $12/Month? →
2. Perplexity — Best for Research
Free tier: Unlimited standard searches, ~5 Pro searches/day | Paid: $20/month
Perplexity’s Chrome extension gives you a keyboard shortcut to search with source citations without opening a new tab. Highlight text on any page and right-click to “Ask Perplexity” — it opens a sidebar with a sourced answer.
Why it stays installed: For fact-checking while reading articles, researching topics while writing, or getting cited answers fast — it’s faster than copying text to a separate Perplexity tab.
3. Tactiq — Best for Meeting Transcription
Free tier: 5 transcriptions/month | Paid: $12/month
Tactiq transcribes Google Meet, Zoom, and Microsoft Teams calls in real time and generates AI summaries, action items, and follow-up email drafts from the transcript. The free tier gives you 5 full transcriptions per month — enough for weekly team meetings.
Why it stays installed: Eliminates the “who was going to do what?” confusion after every call. The AI-generated action item list alone justifies the install.
4. Sider AI — Best All-In-One Sidebar
Free tier: ~40 AI queries/day | Paid: $8/month
Sider AI is a sidebar that gives you access to Claude, GPT-4o, and Gemini in one place, without leaving whatever page you’re on. Highlight text → open sidebar → ask any AI about it. Use it for explanations, translations, summaries, or rewrites of content you’re reading.
Why it stays installed: If you regularly need AI help while reading web content and don’t want to switch between multiple tabs, Sider keeps everything in one place.
5. Gemini in Chrome — Best for Google Users
Free tier: Included with Google account | Paid: Gemini Advanced $20/month
Google’s official Gemini Chrome extension lets you ask questions about any open tab, compare two tabs side by side with AI, and get YouTube video summaries without watching the whole video. Deeply integrated with Google Workspace.
Why it stays installed: The YouTube summary feature alone is worth it — paste a YouTube link and get a timestamped summary of a 45-minute video in 30 seconds.
6. Wordtune — Best for Sentence Rewriting
Free tier: 10 rewrites/day | Paid: $14/month
Wordtune shows up as a small button next to any sentence you’ve written and offers multiple rewrite options — shorter, longer, more formal, more casual. Unlike Grammarly, which corrects errors, Wordtune suggests stylistic alternatives to sentences that are technically correct but could be better.
Why it stays installed: Particularly useful for anyone who writes the same type of content repeatedly (emails, reports, LinkedIn posts) and wants variety without rewriting from scratch.
7. Eightify — Best for YouTube Summaries
Free tier: 5 summaries/month | Paid: $8/month
Eightify adds a “Summary” button to every YouTube video. Click it and get a structured summary with timestamps — useful for deciding whether a 40-minute video is worth watching, or for extracting key points from an educational video without sitting through it.
Why it stays installed: For anyone who uses YouTube as a learning resource, Eightify pays for itself in the first week. The timestamp integration is the key feature — you can jump directly to the section you actually care about.
Quick Comparison
| Extension | Best For | Free Tier | Paid |
|---|---|---|---|
| Grammarly | Writing everywhere | Good | $12/month |
| Perplexity | Research with citations | Good | $20/month |
| Tactiq | Meeting transcription | 5/month | $12/month |
| Sider AI | Multi-model AI sidebar | ~40/day | $8/month |
| Gemini in Chrome | Google users, YouTube | ✅ Included | $20/month |
| Wordtune | Sentence rewriting | 10/day | $14/month |
| Eightify | YouTube summaries | 5/month | $8/month |
My Recommended Stack
For most people (install these 3):
– Grammarly (writing, always on)
– Perplexity (research, on demand)
– Gemini in Chrome (YouTube summaries, Google users) or Eightify (non-Google users)
Add if you have the specific need:
– Tactiq → you’re in a lot of video calls
– Sider AI → you want multi-model AI without tab switching
– Wordtune → you write repetitive content and want sentence variety
Don’t install all of them at once. Extension bloat slows your browser. Install the three that match your biggest daily pain point and add others only when you identify a gap.
Murphy’s Take
The extension I thought I didn’t need but now can’t work without: Tactiq. I was skeptical about paying for meeting transcription. Then I missed a Zoom call and the automatic summary with action items was in my inbox before the meeting ended. It’s been in my browser ever since.
The extension with the highest “sounds useful, not actually useful” rate: all-in-one AI sidebars. Most people don’t need Claude, ChatGPT, AND Gemini in a sidebar — they need one AI they trust and know how to prompt effectively. Start with Grammarly, Perplexity, and one YouTube summarizer. That covers the gaps that regularly come up in a real workday.
FAQ
Q: What is the best free AI Chrome extension in 2026?
A: Grammarly’s free extension is the most universally useful because it works everywhere you type and catches writing errors in real time. For research, Perplexity’s free extension gives source-cited answers faster than Google. For YouTube, Gemini in Chrome (free with a Google account) or Eightify (5 free summaries/month) are the best options.
Q: Do AI Chrome extensions slow down your browser?
A: Yes, having too many active extensions uses RAM and can slow page loads. The recommendation is to keep only 3-5 daily-use extensions active and disable others when not needed. Chrome’s Extension Manager lets you turn individual extensions on and off without uninstalling them.
Q: Is Grammarly safe to use in Chrome?
A: Grammarly does read text you type in browser text fields to provide corrections — this is how any writing assistant works. Grammarly states in its privacy policy that it does not sell user data. For highly sensitive work (legal documents, medical records, proprietary code), consider turning Grammarly off on specific sites or using their desktop app where you control what gets sent.