Pluginofficial publisher

Merlin

Plugin : A set of capabilities installed into an AI application or a host · requires chrome

Multi-model assistant for summarising, writing and answering from any page.

Solid, in the same family as Sider and Monica.

Official site

Overall score

7.0 /10

Security: one caveat, see the card

Utility

7.0

Reliability

6.0

Security

One caveat

Ease

1 click · Beginner

Security reflects where data goes, requested permissions and incidents on record at the verification date. It is not a guarantee of zero risk: check the deployment mode and the connections you enable.

What it does, concretely

Switching between AI tools by opening new tabs wastes time and breaks context. Merlin solves this by bringing more than twenty AI models (GPT-4o, Claude, Gemini, Llama, Mistral, Deepseek and others) into a single sidebar accessible from any webpage, without leaving what you are working on.

In practice, a keyboard shortcut (Ctrl+M on Windows, Cmd+M on Mac) opens the Merlin panel on the current page. You can then ask for a summary of the displayed article, draft a reply to a Gmail message, get a timestamped summary of a YouTube video, or ask questions about an uploaded PDF document. The extension also integrates directly into Google Search, LinkedIn and Gmail to offer contextual suggestions.

Merlin suits freelancers, students, content creators and professionals who regularly juggle research, writing and summarisation tasks, and who want access to multiple models without managing separate subscriptions. The free plan offers a daily query quota sufficient to test all features before committing.

On the other hand, Merlin is not suitable for people working with sensitive or confidential data, as the extension reads the content of visited pages and sends it to its servers before forwarding it to the model APIs. It is also not a good fit for those who need truly unlimited usage with no caps, or for teams looking for an enterprise AI solution with advanced security guarantees.

What it offers

·Access to more than twenty AI models (GPT-4o, Claude, Gemini, Llama, Mistral, Deepseek and others) from a single interface, without separate subscriptions.
·Sidebar activated by keyboard shortcut (Ctrl+M / Cmd+M) on any webpage to summarise, write or translate in context.
·Timestamped YouTube video summaries generated directly on the video page.
·Integration into Gmail, LinkedIn and Google Search to draft replies and posts without switching tabs.
·Chat with uploaded PDF files or documents, with source-cited answers (paid).
·Image generation directly in chat (paid for advanced models).
·Code interpreter for analysing data from spreadsheets, images or documents (paid).
·Support for more than twenty-five languages for responses and translations.

Our tips

Start with the free plan and track your daily usage for a week: if you stay within the query quota, you do not need to upgrade to a paid plan.
Use the Ctrl+M (or Cmd+M on Mac) shortcut directly on a YouTube page or a long article to get a summary without copying and pasting any text.
Switch models depending on the task: some models are better suited to creative writing, others to code or analysis; testing several models on the same question lets you compare results.
If you are working with sensitive information, disable URL collection in the extension settings, or avoid using Merlin on those pages.
Monitor your query quota from the Merlin dashboard to avoid hitting the daily limit mid-session, especially when using resource-intensive features such as code analysis or image generation.

Watch out

The extension requires broad permissions to read the content of all visited pages, and data passes through Merlin's servers before reaching the model APIs: avoid using it with confidential professional content.
Even paid plans are subject to fair use caps on the most powerful models and the most resource-intensive features, which the word 'unlimited' displayed in the plans does not always reflect clearly.

In practice

Price: Freemium · from 19 €
Commercial use: Commercial use: yes
Available on: chrome, edge
Host: chrome
FR interface: No

Security and data

Rating: Security: one caveat, see the card
Your data: Data with the vendor
Maintenance: Active

Links and repository checked on 25 October 2026 · added on 1 December 2022

How to install Merlin

1. Open the Chrome Web Store and search for 'Merlin Ask AI', or go directly to getmerlin.in. 2. Click 'Add to Chrome' (or 'Add to Edge') and read the requested permissions carefully before confirming: the extension accesses the content of all pages you visit. 3. Pin the Merlin icon to your browser toolbar for quick access. 4. Create a free account at getmerlin.in, verify your email address, then sign in to the extension. 5. Press Ctrl+M (Windows) or Cmd+M (Mac) on any page to open the sidebar and start using Merlin.

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