💡 Can't open a PDF? Install one of the viewers below. All are free.
A PDF viewer is a program for reading PDF files. We recommend the best viewer for each platform.
To edit or convert PDFs, use the WooaPDF tools above.
💻 PC (Windows / Mac)
📕
Adobe Acrobat Reader
Adobe Inc.
Windows
Mac
Industry Standard
The world's most used PDF viewer. Includes annotations and basic editing. Larger install size.
🦊
Foxit PDF Reader
Foxit Software
Windows
Mac
Lightweight
Lighter and faster than Adobe Reader. Free annotations, forms, and signature features.
📐
SumatraPDF
Krzysztof Kowalczyk
Windows
Ultra-light
No Install
Ultra-lightweight portable PDF viewer. No install needed. No ads or updates.
📱 Android
📕
Adobe Acrobat Reader
Adobe Inc.
Android
Free
Mobile-optimized PDF viewer. Free annotations, signatures, and form filling.
🦊
Foxit PDF Reader
Foxit Software
Android
Free
Lightweight Android PDF viewer. Cloud sync and night mode supported.
🍎 iPhone / iPad (iOS)
📕
Adobe Acrobat Reader
Adobe Inc.
iPhone
iPad
Free
iOS-optimized PDF viewer. Apple Pencil annotations and iCloud sync supported.
📖
Files App
Apple (Built-in)
iPhone
iPad
No Install
iOS/iPadOS has a built-in PDF viewer. Open PDFs directly in the Files app or Safari without any extra app.
✅ Already Installed
💡 Need to edit or convert your PDF?
PDF viewers are read-only. To convert, merge, or compress PDFs,
Use
WooaPDF tools for free.
Use directly in your browser — no sign-up needed.
Frequently Asked Questions
Q. Which PDF viewer is best?
Adobe Acrobat Reader is the most widely used. Sumatra PDF is lightweight and fast. Foxit Reader is feature-rich.
Q. Are these PDF viewers free?
Yes. All PDF viewers listed here are free for personal use.
Q. Do I need a PDF viewer if I use WooaPDF?
WooaPDF tools work in any browser without a separate viewer. But a desktop viewer is useful for daily PDF reading.