Best AI Browser Extensions 2026 - Chrome Extensions Ranked

Claude in Chrome is the biggest shift on this list because it does not just read pages, it acts on them. You describe a task and Claude navigates between tabs, clicks, types and fills in forms, pulling data from dashboards or tidying up a calendar while you work on something else. It can run workflows in the background, and it connects with Claude's other tools, including Claude Code for testing web apps during development.

After a long research preview, Anthropic made it generally available on all paid plans in August 2026. Claude Pro is $20/month, or $17/month billed annually, and Max starts at $100/month for heavier use. It is Chrome only. Anthropic is upfront about the risks of browser agents: it has built-in defenses against prompt injection, but you should keep it away from banking, passwords and sensitive personal data, and review what it does on important sites.

Grammarly is still the extension I would install first for anyone who writes on the web. It works inside Gmail, Google Docs, LinkedIn, Slack, CMS editors and almost every other text field, catching spelling and grammar errors and flagging tone as you type. The free plan covers corrections and tone detection and includes 100 AI prompts for generating or rewriting text.

Grammarly Pro starts at $12/month and adds full-sentence rewrites, tone adjustments, fluency suggestions, plagiarism and AI-text detection, and 2,000 AI prompts per month. Grammarly now sits under the Superhuman platform, alongside a growing set of AI agents for things like citations and feedback. Deciding between Grammarly and a paraphrasing tool? Read our Grammarly vs QuillBot comparison.

The Perplexity extension puts its answer engine in a Chrome side panel. Ask about the page you are on and get a summary, or ask a broader question and get an answer with linked sources, without leaving the tab. For research, fact-checking and quickly understanding long articles, cited answers are a big step up from a generic chatbot that may confidently invent details.

The free plan is enough to try it properly. Perplexity Pro is $20/month, or $17/month billed annually, and unlocks more advanced searches, deep research, model selection and higher limits. If you find yourself living in Perplexity, its Comet browser (covered below) is the more complete version of the same idea.

Sider is the most complete of the "AI sidebar" extensions. Open it on any page and you can chat with several leading AI models, ask questions about the current page or YouTube video, summarize PDFs, translate text in place, and use quick actions on any text you highlight. It works across Chrome, Edge and other browsers, with apps for desktop and mobile too.

The appeal is consolidation: instead of paying for several chatbot subscriptions, you get access to multiple models in one place. Sider uses a credit system, where everyday models use basic credits and the most advanced models use a smaller pool of premium credits, so check the plan details against how you work before upgrading. The free tier is enough to see whether the sidebar habit sticks.

Merlin covers similar ground to Sider with a slightly different focus. It is known for fast summaries of web pages, YouTube videos and long threads, a chat sidebar with multiple AI models, and writing help that appears inside sites like Gmail and LinkedIn. A free tier lets you try it before paying.

Where Merlin stands out is how quickly it turns content into something usable: summarize a video, draft a reply to the email you are reading, or pull key points from a long report. Paid plans add access to the stronger models and higher limits, with team plans for companies. If you mostly want summaries and quick replies, it is a strong alternative to Sider.

MaxAI is a one-click AI toolbar for reading, writing and replying anywhere on the web. Highlight text to explain, rewrite or translate it, summarize pages and videos, and draft responses inside email and social sites. Its free plan is unusually generous: unlimited chat on a fast free model plus three chats per day on the more capable Pro models.

MaxAI Pro is $12/month billed yearly or $30/month billed monthly, and unlocks unlimited Pro chats, a choice of advanced models, higher file upload limits and image generation. It also supports adding team members to paid plans. If you want sidebar-style AI without committing to a subscription, MaxAI's free tier is the easiest way to start.

Monica is an all-in-one AI assistant that lives in your browser sidebar and also runs as desktop and mobile apps. It offers chat with several major AI models, page and PDF summaries, translation, writing tools and image features, with a polished interface that feels less cluttered than some rivals.

Access to the most advanced models is metered on Monica's plans, so heavier use of the top models depends on which tier you pick. The free plan is enough to test the sidebar properly before paying. Choose Monica if you want one assistant that follows you across browser, desktop and phone.

Glasp is for people who read a lot online and want to keep what they read. Highlight passages on any web page, collect them in one library, and export or sync them to tools like Notion. On top of that sit AI features: summaries of YouTube videos and PDFs, and chat with pages, videos and documents. The free plan includes unlimited public highlights and a small monthly allowance of AI summaries and chat.

Glasp Pro is $12.50/month or $150/year and adds unlimited private highlights and much higher AI limits, with an Unlimited plan at $30/month and a student discount on Pro. If you prefer a dedicated read-it-later app, Readwise is the established alternative: its full plan is $9.99/month billed annually and includes the Reader app, which has its own browser extension and AI reading assistant.