What is the best AI tool for chatting with pdfs?

On AIToolMaps, ChatPDF ranks first for chatting with pdfs, followed by Kimi and NotebookLM. The ranking weighs how central the job is to each tool, how complete and checked its listing is, and what members upvote, save and review.

Is there a free AI tool for chatting with pdfs?

Yes. 5 of the 7 tools listed for chatting with pdfs have a free plan or are free to use, including ChatPDF, Kimi and NotebookLM.

Which AI tools for chatting with pdfs have an API?

3 of them offer an API for developers, including ChatPDF, Claude and Scite.

Can I do chatting with pdfs on my phone?

Yes. 2 of the tools have an iPhone or Android app, including NotebookLM and Claude.

Task · Productivity & Office

Best AI tools for chatting with pdfs

Ranked by how central this job is to each tool, how complete and checked its listing is, and what members upvote, save and review.

Tools: 7
Free options: 5
Updated: Nov 4

Sort

1
ChatPDFVerified Nov 4, 2026
Upload a document, ask questions in plain language, and get answers with page citations.
Free tierWeb
Visit
2
Kimi
Long-context assistant that reads huge documents.
Free tier
Visit
3
NotebookLM
Google's AI notebook that grounds every answer in your uploaded documents, PDFs and audio files with source citations.
Free tier · from $9.99/moWeb, iOS, Android
Visit
4
SciSpace
An AI tool for reading research papers with inline concept explanations, full-paper Q&A and related literature discovery.
PaidWeb, Browser extension
Visit
5
Claude
Anthropic's AI assistant with a long context window, nuanced reasoning and strong performance on writing and analysis.
Free tier · from $20/moWeb, iOS, Android, API
Visit
6
Scite
An academic research platform that classifies citations as supporting or contrasting, showing the evidential weight behind published claims.
Free trialWeb, Browser extension
Visit
7
HumataVerified Nov 4, 2026
Lets researchers, students, and teams ask questions across their PDFs and get answers with citations.
Free tier · from $9.99/moWeb
Visit

How to choose

Tools for chatting with PDFs differ mostly in what they are built around. ChatPDF is a general web app for uploaded files, with page citations, a side-by-side document view, multi-document folders, and an API; it can be tried without an account. Humata emphasizes asking across many files and citing source passages, with a free tier limited by uploaded pages. NotebookLM focuses on source-grounded notebooks and can also generate audio overviews, and it works on web and mobile. SciSpace is aimed at academic papers, offering inline explanations and literature discovery, but lists no free plan. Claude takes a different approach as a general assistant with a long context window, file uploads, projects, and an API, though its free tier has daily limits. Weigh whether you need multi-file work, academic features, mobile access, citations you can verify, or developer access.

Narrow it down

Best Free AI Tools for Chatting with PDFs5

Researching a topic Summarizing long text Asking questions about your documents Chatting with an AI assistant Searching the web with AI Studying with an AI tutor Building chatbots for your website Taking and organizing notes

Common questions

What is the best AI tool for chatting with pdfs?: On AIToolMaps, ChatPDF ranks first for chatting with pdfs, followed by Kimi and NotebookLM. The ranking weighs how central the job is to each tool, how complete and checked its listing is, and what members upvote, save and review.
Is there a free AI tool for chatting with pdfs?: Yes. 5 of the 7 tools listed for chatting with pdfs have a free plan or are free to use, including ChatPDF, Kimi and NotebookLM.
Which AI tools for chatting with pdfs have an API?: 3 of them offer an API for developers, including ChatPDF, Claude and Scite.
Can I do chatting with pdfs on my phone?: Yes. 2 of the tools have an iPhone or Android app, including NotebookLM and Claude.