Description
Sider is a browser-based AI copilot that lives in a sidebar on any webpage. It lets you chat with advanced AI models, summarize pages and videos, translate or rewrite text, and generate content without leaving the site you’re on
It’s best known as a Chrome extension (also works on Edge). There’s also a web app; mobile or desktop apps are less central to the product
- Chat with top AI models, including GPT-5, Claude, Gemini, Grok, DeepSeek, etc.
- Summarize web pages/PDFs/images/audio/YouTube
- Translate/rewrite/grammar‑fix
- OCR screenshots
- Code explain
- Agents: deep research, slides maker, web creator, etc.
Recognitions:
- Top 30 OpenAI partner
- 2025 Chrome Editor’s Pick
- 10M+ active users
- 4.9/5 rating






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