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Side Reader
✓ verifiedFreemium
Browser extension that adds a PDF viewer/chat sidebar to ChatGPT, Claude, and DeepSeek for reading and querying documents.
341 visits/mo
Pricing
Free: $0/mo (limited uploads and file size)
Lifetime: $29 one-time (higher upload limits, capture-and-ask, custom prompts)
Core features
- ✦Split-screen PDF viewer alongside AI chat
- ✦Zoom and text-copy tools for PDFs
- ✦Upload history tracking
- ✦Capture-and-ask screenshot querying (paid)
- ✦Custom prompt support (paid)
Use cases
- →Researchers reading and querying PDFs via AI
- →Students studying documents with AI help
- →Professionals reviewing reports using ChatGPT/Claude/DeepSeek
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