Monica

The one particular kind of browser fatigue that stems from having to keep one tab open for ChatGPT, one for DeepL, and one for your writing tool of choice is something that Monica is engineered to bring into a single place. Monica is a browser sidebar that you can activate on any page to get GPT-4o, Claude, Gemini, and other language models for chat, writing assistance, translation, summarization, and image generation—all without a new tab ever opening. Simply highlight text on a page, and a pop-up smart toolbar will give you options to translate, explain, or rewrite it in seconds. If a translation of an entire webpage is what you’re after, the full-page translation surprisingly holds the layout, and there’s an in-Gmail and Outlook experience that lets you draft responses without ever leaving your email. Monica already has over 10 million users across its Chrome, Edge, iOS, Android, and desktop applications, indicating it clearly hit a nerve with users seeking a breadth of capabilities. The honest disclaimer here is that the credit system can get confusing, and heavy users of top-tier models such as GPT-5 and Claude Opus will find they can blow through their credits quicker than one might initially think. But even so, the free plan gets you pretty far with many day-to-day tasks.

• Category: ChatGPT Extensions
• Pricing: Freemium
• Rating: 4.5 / 5 (0 reviews)
• Platforms: Chrome, Edge, iOS, Android, macOS, Windows

Key features

• Multi-model AI sidebar — Access GPT-4o, Claude, Gemini, and other models from one persistent sidebar on any webpage without managing separate subscriptions
• Smart text toolbar — Highlight any text anywhere on the web and instantly translate, summarize, explain, rewrite, or expand it without leaving the page
• Full-page translation — Converts entire websites into your language while keeping the original layout and formatting intact rather than sending you to a translated copy
• Email drafting in Gmail and Outlook — Composes and rewrites emails directly inside your inbox without copying content into a separate AI tool
• AI image generation — Create images from text prompts using DALL-E and Stable Diffusion built directly into the sidebar
• Webpage summarization — Condenses any article or page into key points so you can decide in seconds whether it is worth reading in full
• Monica Code — AI coding assistant for VS Code and JetBrains that provides context-aware suggestions and code generation inside your IDE
• Video generation — Short AI video clips using Sora 2 built into the sidebar for users who need quick visual content

Pros & Cons

Pros

• Over 10 million users across browser extension, desktop app, and mobile which makes it one of the most widely adopted AI sidebars available
• Full-page translation with layout preservation is genuinely better than most standalone translation tools
• Free plan gives unlimited access to GPT-4o mini which is capable enough for everyday tasks like summaries, drafts, and quick questions
• Available on Chrome, Edge, iOS, Android, Windows, and Mac which means your AI assistant follows you across every device
• Smart text toolbar is fast and accurate, highlights on any page and the options appear immediately without any noticeable delay

Cons

• Credit-based pricing introduced in January 2026 makes it harder to predict your actual monthly usage before you hit limits
• Heavy users of premium models like GPT-5 or Claude Opus will exhaust advanced credits faster than the plan descriptions make obvious
• The sheer range of features from image generation to video to coding means some individual tools are not as polished as standalone alternatives built specifically for that task
• Some users find the sidebar takes up meaningful screen real estate on smaller laptop displays especially when working with narrow content layouts

Visit Monica