Xodo

Xodo is a versatile, cross-platform PDF solution that seamlessly bridges the gap between a robust desktop editor and a highly responsive mobile application. It is widely recognized for offering an incredibly generous suite of tools—including viewing, annotating, signing, and syncing PDFs—completely for free across iOS, Android, and Windows devices. It has become a favorite among students, educators, and mobile professionals who need to mark up documents and take notes directly on their tablets or smartphones. The platform excels in its seamless cloud integration. Xodo connects effortlessly to Google Drive, Dropbox, and OneDrive, meaning a user can start highlighting a textbook on their iPad and instantly pick up where they left off on their Windows laptop. Beyond basic annotation, the web-based version of Xodo (Xodo Sign) provides advanced document manipulation tools, allowing users to merge multiple PDFs, compress large files for email, convert Word documents to PDF, and securely request electronic signatures from clients. **Pricing:** Xodo's core viewing, annotating, and syncing features are completely free on mobile and desktop apps. To access advanced tools like unlimited document conversions, file compression, and premium editing features, users must subscribe to Xodo Pro, which costs $9.00/month (billed annually at $108).