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Read Smarter with AI Assistance

Upload your PDFs, select any text, and get instant AI-powered explanations. Perfect for academic research, technical documents, and deep learning.

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Trusted by students and researchers at leading universities

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How It Works

Three simple steps to unlock the knowledge in your documents

Upload PDFs

Drag and drop your PDF documents. We support academic papers, textbooks, legal docs, and more.

Select Text

Highlight any text you don't understand. Our AI analyzes the context around your selection.

Get Explanations

Receive instant, clear explanations in the chat panel. Ask follow-up questions anytime.

What Researchers Say

Join thousands of students and researchers who trust TextLumen

Dr. Sarah Chen
Dr. Sarah Chen
Research Fellow, Stanford

"TextLumen has transformed how I review academic papers. The AI explanations save me hours of research time."

Michael Roberts
Michael Roberts
PhD Candidate, MIT

"Finally, a tool that understands complex technical documents. The context-aware explanations are incredibly accurate."

Dr. Emily Watson
Dr. Emily Watson
Professor, Oxford

"I recommend TextLumen to all my graduate students. It's like having a knowledgeable assistant available 24/7."

James Liu
James Liu
Law Student, Harvard

"Parsing through dense legal documents used to take forever. Now I can quickly understand complex clauses and precedents."

Dr. Anna Mueller
Dr. Anna Mueller
Medical Researcher, Cambridge

"The ability to chat with my research papers has accelerated my literature review process significantly."

David Park
David Park
Engineering Student, Caltech

"Technical specifications and equations are no longer intimidating. TextLumen breaks everything down clearly."

Simple Pricing

Choose the plan that fits your reading needs

Free Forever

Basic

Free
  • 5 PDF uploads
  • 40 messages per PDF
  • Basic context analysis
  • Chat history
Start Free

Medium

$9.99 /month
  • Unlimited PDF uploads
  • 1,000 messages per month
  • Enhanced context analysis
  • Chat history
  • Priority support
Get Started
Most Popular

Advanced

$19.99 /month
  • Unlimited PDF uploads
  • 4,000 messages per month
  • Large context analysis
  • Chat history
  • Priority support
  • Early access to features
Get Started

Max

$29.99 /month
  • Unlimited PDF uploads
  • 6,000 messages per month
  • Maximum context analysis
  • Chat history
  • Priority support
  • Early access to features
  • Dedicated support
Get Started

Frequently Asked Questions

Everything you need to know about TextLumen

TextLumen is an AI-powered PDF reading assistant that helps you understand complex documents. Simply upload a PDF, select any text, and get instant explanations powered by advanced AI.
When you select text in your PDF, our AI analyzes the selection along with its surrounding context to provide accurate, relevant explanations. It understands academic terminology, technical concepts, and can break down complex ideas into simpler terms.
Yes, we take security seriously. Your PDFs are stored securely and are only accessible to you. We use encryption for data transfer and storage. Your documents are never shared with third parties or used to train AI models.
Currently, we support PDF files up to 50MB. We're working on adding support for more formats including Word documents, ePub, and more in future updates.
Yes! Our Basic plan is completely free and includes up to 5 PDF uploads and 40 AI messages per document. For heavier usage, check out our affordable premium plans.
Yes, TextLumen can process PDFs in any language and provide explanations in your preferred language. The AI understands context across many languages including English, Spanish, French, German, Chinese, and more.
Yes! With our folder feature, you can organize PDFs into collections and ask questions that span multiple documents. This is perfect for research projects or comparing sources.
Yes, we offer a REST API for developers who want to integrate TextLumen's capabilities into their own applications. Check out our API documentation and playground to get started.

Still have questions?

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