Merlin
AI browser extension for research and summarising web pages.
01 What is Merlin?
Merlin is a browser extension that brings GPT-5, Claude, and Gemini directly into your browser. Summarise any web page, YouTube video, or PDF with one click, ask questions about what you're reading, and write AI-assisted responses in Gmail or LinkedIn.
02 Best For
- ▸Summarising web pages instantly
- ▸YouTube video summaries
- ▸In-browser AI research
- ▸Writing assistance in Gmail and LinkedIn
03 How to Get Started
- 01
Install Merlin from getmerlin.in or your browser's extension store.
- 02
Visit any webpage and click the Merlin icon to summarise.
- 03
Use the chat panel to ask questions about the current page.
Pro Tips
- ◆Install the browser extension so it works across any site — Gmail, LinkedIn, Google Docs — not just a standalone chat.
- ◆Use it to summarize long pages or YouTube videos before deciding whether to read/watch in full.
- ◆Switch models (GPT-5, Claude) within the same extension for different tasks without changing tools.
- ◆Use its PDF chat feature to ask questions directly against a document instead of reading it end to end.
04 At a Glance
Strengths
- +Summarising web pages instantly
- +YouTube video summaries
- +In-browser AI research
- +Writing assistance in Gmail and LinkedIn
- +Free tier you can start with today
Things to consider
- !The free plan has limits; advanced features need a paid plan.
- !Pricing and features change often — confirm current details on the official site.
- !AI output should be reviewed before you rely on it.
Placement reflects our editorial assessment of fit for this use case, not paid placement. Some links may be affiliate links — this never changes our rankings. How we rank →
06 Frequently Asked Questions
Is Merlin free?
Yes — a free tier with daily usage limits; paid plans raise limits and unlock more models.
What is Merlin best for?
Bringing AI chat, summarization, and multiple models into every website you visit via a browser extension.
Which AI models does Merlin support?
It gives access to several underlying models like GPT-4 and Claude through one unified extension.