Last updated 08-14-2026
Category:
Reviews:
Join thousands of AI enthusiasts in the World of AI!
LightPDF
LightPDF lets you upload PDFs, Word files, Excel spreadsheets, PowerPoint decks, and scanned documents, then ask questions and get cited answers back. The ChatPDF feature runs on GPT-4, supports multi-document chats, OCR for scanned files, and follow-up questions. You can upload a file up to 100 pages on the free web tier before upgrading.
Unlike standalone ChatPDF clones, LightPDF bundles document chat into a wider PDF toolkit with conversion, editing, e-signatures, and a dozen other AI tools like mind map creation, PDF translation, and presentation generation. One premium subscription covers Windows, Mac, Android, iOS, and the web app, with AI credits allocated monthly or as a one-time pool on the perpetual plan.
Researchers, students, and office workers use LightPDF to summarize contracts, extract tables from financial reports, and pull outlines from long readings. Business teams can also use it for document Q&A on proposals and compliance files. The company behind LightPDF has operated since 2015 and holds ISO/IEC 27001, ISO/IEC 27701, and GDPR certifications.
Chat with PDF, Word, Excel, PPT, EPUB, TXT, and scanned files using GPT-4
Upload documents up to 100 pages free on the web app before upgrading
Multi-document chat lets you query several files in one session
Answers include clickable citations pointing to the source passage
Premium includes 1,000 AI credits per month on monthly and annual plans
One subscription covers Windows, Mac, Android, iOS, and web platforms
Free web tier handles ChatPDF on files up to 100 pages without a credit card.
One Premium subscription unlocks Windows, Mac, Android, iOS, and web apps.
Answers cite source passages so you can verify where information came from.
Bundles ChatPDF with PDF editing, conversion, e-signatures, and 10+ other AI tools.
Premium Windows accounts allow only one active session at a time.
Unused monthly AI credits expire at the end of each calendar month.
AI features and some converters require an internet connection even on desktop.
Is LightPDF free to use?
LightPDF offers a free web tier where you can upload files up to 100 pages for ChatPDF. LightPDF Premium unlocks all platforms and includes 1,000 AI credits per month on subscription plans.
What file types does LightPDF support?
LightPDF accepts PDF, DOC, DOCX, XLS, XLSX, PPT, PPTX, EPUB, TXT, RTF, JPG, PNG, TIFF, HEIF, WebP, SVG, HTML, and more. LightPDF also handles scanned documents through built-in OCR.
How do AI credits work on LightPDF?
LightPDF allocates 1,000 AI credits per month on monthly and yearly Premium plans. LightPDF Perpetual delivers 40,000 credits once that never expire. Unused monthly credits expire at the end of each calendar month.
Which platforms does LightPDF run on?
LightPDF works on Windows, Mac, Android, iOS, and the web. LightPDF Premium covers all five platforms with one account, though only one Windows session can be active at a time.
Is my data safe on LightPDF?
LightPDF stores files in encrypted cloud storage and uses 256-bit SSL for transfers. LightPDF complies with GDPR, ISO/IEC 27001, and ISO/IEC 27701, and you can delete your files at any time.
Does LightPDF offer a free trial?
LightPDF offers a limited free web version and a 3-day free trial on the yearly Premium plan. LightPDF refund windows are 3 days for monthly, 7 days for annual, and 30 days for perpetual licenses.