Side Reader
verifiedFreemiumside-reader.com
Browser extension that adds a PDF viewer/chat sidebar to ChatGPT, Claude, and DeepSeek for reading and querying documents.
What it does
Side Reader is a browser extension that opens PDFs in a split-screen sidebar next to ChatGPT, Claude, or DeepSeek so users can read and chat with a document at the same time. It offers zoom, text copying, and upload history alongside the paid lifetime tier's extra capabilities.
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)
Best for
→Researchers reading and querying PDFs via AI
→Students studying documents with AI help
→Professionals reviewing reports using ChatGPT/Claude/DeepSeek
Pricing
Free
Lifetime
$29
Toolspool rankingby monthly traffic