Chat & research · by ChatPDF
ChatPDF
Upload a PDF and ask questions about it in chat, with answers linked to page references.
+ Zero setup: drop a PDF and start asking, with page citations for every answer.
− Free plan caps file size and page count, and long or scanned PDFs often produce vague answers.
Open ChatPDF ↗ best for: quick questions about a single PDF
Evidence
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+ Produces natural, editable prose and follows nuanced instructions over very long documents better than most rivals.
− Pro usage limits can run out mid-session on long conversations, and it has no built-in image generation.
+ Answers are grounded strictly in your uploaded PDFs, Docs, URLs and YouTube videos with citations, and Audio Overviews turn them into a two-host podcast.
− Sources are capped per notebook and the free tier limits daily queries and audio generations.
+ Very fast responses and EU-hosted data handling, with a cheaper Pro tier than the US incumbents.
− Smaller model ecosystem and fewer integrations, and answers lag the top US models on hard reasoning tasks.
+ Available almost everywhere, including an API for developers who want document Q&A inside their own product.
− Answer quality is middling on long documents and the free tier is restrictive on uploads and questions.
+ The Copilot sidebar explains equations, tables and jargon in a paper you are reading without leaving the PDF.
− The free tier is limited and the interface pushes upgrades aggressively.