Data month 2026-09

AI PDF Annotator

Office & Collaboration

AI Notes & Knowledge

Read PDFs with AI. Select text or screenshot to ask questions. Supports OpenAI, Claude, Ollama and custom providers.

Add to Chrome ↗

According to AlphaMoat, as of 2026-09, the Chrome extension AI PDF Annotator has 22 users (+22.2% MoM) — ranked #7,192 of 9,324 AI browser extensions, and #1,421 of 1,839 in Office & Collaboration.

Users · 2026-09

22+22.2%

Rating

Overall Rank (9,324)

#7,192

Office & Collaboration Rank

#1,421/ 1,839

What is AI PDF Annotator

From the Chrome Web Store

Read PDFs with AI. Select text or screenshot to ask questions. Supports OpenAI, Claude, Ollama and custom providers. AI PDF Annotator — Smart PDF Reader with AI-Powered Annotations

Read, annotate, and understand PDFs with the help of AI. Select any text or take a screenshot, ask a question, and get instant AI explanations right on your document.

🔹 Core Features:

Text Selection Q&A — Select text in PDF, click "Ask", get AI explanation instantly
Screenshot Q&A — Capture any area (diagrams, formulas, charts) and ask AI to explain
Capture Pages — Render multiple pages as a single image for AI analysis
Persistent Annotations — All Q&A pairs are saved per PDF, restored on reload
Follow-up Questions — Continue asking within each annotation's context
Smart Context — Only sends first + last conversation turn to save API tokens
4 Themes — Dark, Light, Sepia, Green

🔹 AI Providers:

OpenAI API (GPT-4o, GPT-4.1, o4-mini)
Claude API (Sonnet 4, Haiku 4.5)
Ollama (local models — llama, qwen, deepseek, etc.)
Custom endpoint (LM Studio, vLLM, or any OpenAI-compatible API)

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🔹 Privacy-First:

Your API keys are stored locally, never sent to any third-party server
All data stays in your browser (chrome.storage)
No analytics, no tracking, no ads
CORS handled automatically for local AI servers — no manual configuration needed

🔹 How It Works: 1. Open any PDF (online or local file) 2. The extension automatically opens it in the built-in reader 3. Select text → click "Ask" → AI explains it in the sidebar 4. Or use Screenshot/Capture Pages for images, diagrams, formulas 5. All annotations are saved and can be revisited anytime

Bring your own API key. Supports both cloud AI (OpenAI, Claude) and fully offline local models (Ollama). Your documents and conversations never leave your device.

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AI PDF 智能标注 — AI驱动的PDF阅读与标注工具

选中文字或截图，一键向AI提问，答案直接标注在PDF上。

主要功能：