MobiPDF for Windows (formerly PDF Extra)
Produced by MobiSystems, Inc.
MobiPDF for Windows (formerly PDF Extra) is a powerful PDF editor and converter with a streamlined workflow and an instantly recognizable user interface. The software includes all essential features optimized to meet the needs of any home office or small enterprise, including the ability to fully customize each PDF – from changing the page order, formatting settings, and inserting comments and annotations to editing texts and images and signing documents.
Other useful features include a built-in converter supporting 30+ file formats (Word, Excel, PowerPoint, etc.), a tool to merge and split PDFs, a file compression solution, and dependable security tools like PDF encryption, password protection, digital signatures, and customizable watermarks. To ensure that no important work is lost due to user error or corrupted data and remains accessible on all devices, MobiPDF also comes with an integrated cloud system – the MobiDrive.
FEATURES OVERVIEW
Edit and convert
MobiPDF’s powerful editing capabilities allow users to:
- Edit and resize everything they see – text, images, and anything in between
- OCR PDFs, split them in half or merge them, and create blank PDFs
- Insert images from their PC, laptop, or a quick online search
- Place bookmarks on important bits of information for easier navigation
- Add customizable headers, footers, and page numbering
- Convert PDFs to 30+ file formats: DOCX, XLSX, PPTX, JPG, PNG, EPUB, PDF/A, and more
Combine and compress
With MobiPDF, what was once a rigid document structure turns into a creative playground. Users have granular control over every document outline – from rearranging the page order and rotating, cropping, splitting, or duplicating pages to extracting and deleting pages or adding new ones. Once they’re done, users can significantly shrink the document’s file size with just a few clicks without degrading the quality, thanks to the powerful built-in compression algorithms.
Backup and protect
To prevent any information leaks, MobiPDF comes equipped with a handful of tools to ensure complete user privacy. Users can:
- Restrict the editing, opening, or printing of PDF files to specific people only;
- Shield and restrict sensitive documents with secure passwords;
- Add an extra layer of protection with digital certificate encryption;
- Generate timestamps and create custom watermarks to verify ownership;
- Upload copies of important documents in the secure MobiDrive cloud.
Fill and sign
Users can fill out forms or sign any document in seconds by simply drawing the information in, typing it out, using a saved signature, or attaching an image. They can also stamp documents, insert free-form text, add date and time, and insert “X” or check marks. MobiPDF also allows users to build their own fillable forms from scratch.
Comment and annotate
Commenting on any PDF document is made a breeze thanks to the extensive variety of markup tools available. Some of these include:
- Adding, editing, or removing annotations;
- Inserting free-form texts and adding comments;
- Highlighting texts (and areas) in different colors;
- Adding stamps, such as Approved or Void;
- Advanced features, like striking through texts and drawing mode.
Find out more about MobiPDF.

Windows End user PDF viewer/printer