What is Sider?
Sider is an AI browser assistant that helps people understand online content, complete tasks across websites, and modify web pages with natural-language instructions. Its sidebar provides access to models including GPT, Claude, and Gemini without requiring users to leave the page they are viewing.
The product is organized around three main tools: Sider Chat for working with content, Sider Hand for browser automation, and Sider Code for changing websites. It can process web pages, PDFs, and YouTube videos, while supporting activities such as summarization, translation, research, comparison, and information extraction. Sider is available as a browser extension and through apps for desktop and mobile devices.
Key Features
- Page-aware AI chat: Users can ask questions about the current page, request explanations, and continue with follow-up questions from the browser sidebar.
- Content summaries: Sider can summarize web pages, PDF documents, YouTube videos, and other material encountered online.
- Research and extraction: The assistant can collect, compare, extract, and organize information from multiple websites.
- Multi-step browser automation: Sider Hand can carry out tasks across real websites while working with the user's existing logged-in sessions.
- Website customization: Sider Code accepts plain-language requests to edit, restyle, or simplify a website and can retain those changes for later visits.
- Multiple AI models: The chat interface provides access to AI systems from providers including OpenAI, Anthropic, and Google.
Use Cases
- Summarizing a long article, PDF, or video before reading or watching it in full.
- Comparing products and gathering details from several shopping or research websites.
- Translating online content and asking for explanations of unfamiliar ideas.
- Automating browser-based research, extraction, and organization tasks.
- Adjusting the appearance or layout of frequently visited websites.
Pricing
Sider can be downloaded and used for free, and the official website also links to a dedicated pricing page. Current paid plan details and limits should be checked on the official site.
Who Is It For?
Sider is intended for students, researchers, knowledge workers, shoppers, and other frequent browser users who want AI assistance directly beside online content. It also suits users who need help completing repetitive web tasks or customizing websites without manually editing page code.
