Page Summarizer records 0 monthly visits with — month-over-month growth and Freemium pricing. Sider records 2,644,740 monthly visits with -10.6% growth and Freemium pricing.
Open-source GPT summarizer for web pages, selected text and PDFs
AI sidebar and browser agent for reading, writing and research
| Dimension / Metric | | |
|---|---|---|
| Official Domain | chromewebstore.google.com | sider.ai |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 0 (0) | 2.64M (2,644,740) |
| MoM Traffic Delta | 0 (—) | -314.2K (-10.6%) |
| Primary Market & Share | 🌐 Global (—) | 🇺🇸 United States (13.3%) |
| Direct Visits / mo | 0 | 1.7M |
| User Rating | 4.4 | 4.5 |
| Supported Platforms | Browser Extension | Website |
Open-source GPT summarizer for web pages, selected text and PDFs
Handle a complete web page, just the passage you highlighted, or an attached PDF, all from the same toolbar workflow.
Connect your own OpenAI API key to choose which models you use and pay OpenAI directly for usage, with no middleman markup.
Save different instruction sets — for example a news preset versus a social preset — and reorder them by drag and drop to match your habits.
Use your own prompt to generate and fill out text fields, useful for drafting email replies or form content in place.
AI sidebar and browser agent for reading, writing and research
A persistent panel that reads the page you are on and answers follow-ups with GPT, Claude or Gemini without copying content into another tab.
Summarise long articles, PDFs and YouTube videos, extract key points, and ask detailed questions about the source material.
Translate webpages, PDFs and images, compare bilingual output side by side, and have content read aloud for review on the move.
Delegate multi-step tasks across real websites — price comparison, form filling, research and inbox triage — using your existing logged-in sessions.
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.
SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.
Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools.
Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools.
Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.
Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features.
Highlight the web, learn in public, and build your AI clone
Highlight the web, learn in public, and build your AI clone
Excels at advanced web automation and data extraction alongside chat, but has a steeper learning curve than Sider.
Free AI Summarizer for text, articles, URLs and images
Free AI Summarizer for text, articles, URLs and images
Free / Open-sourceSummarize YouTube, Google, and any page with AI — free in your browser
Free / Open-sourceSummarize YouTube, Google, and any page with AI — free in your browser
Integrates bookmark management and content composition into a clean sidebar, but has a more limited feature set than Sider.
Integrates bookmark management and content composition into a clean sidebar, but has a more limited feature set than Sider.
Delivers streamlined inline writing and webpage summarization via a browser extension, but with fewer custom sidebar tools.
Delivers streamlined inline writing and webpage summarization via a browser extension, but with fewer custom sidebar tools.
One AI sidebar for ChatGPT, Claude and Gemini across the web
One AI sidebar for ChatGPT, Claude and Gemini across the web
Turn long articles, videos and PDFs into structured summaries you can actually search.
Turn long articles, videos and PDFs into structured summaries you can actually search.
