Useful and Robust PDF Annotator with Flexible Tools

Select a tool to mark up the texts or paragraph such as highlight, strikeout and underline, a plenty of diverse colors are also supported to change by click.

Easily add special stamps to annotate your PDF files. Use dozens of predesigned stamps such as "Approved" or "Sign Here", or create your own custom stamps with texts, images or dynamic stamps with date and time to speed up the whole process.

Effortlessly measure distances, perimeters, and areas with just a few clicks. Whether you're a designer, or architect, or need accurate measurements for a critical project, this feature transforms your workflow by enabling you to directly annotate dimensions within the file, ensuring precision and efficiency.

Supports instant discussion with others. You can perform quick operations on other people's comments, such as 'accept' or 'reject', greatly improving collaboration efficiency.