List of the Top 8 PDF Readers for Microsoft 365 in 2026

Adobe Acrobat Studio is a powerful document management and AI-powered platform and one of the leading enterprise document platforms that scales for global teams — providing everything needed to create, edit, convert, share, and secure PDF files. It allows users to modify text and images directly within PDFs, rearrange pages, add comments, and compare document versions for precise change tracking. With seamless conversion capabilities, files can be transformed between PDF and formats such as Word, Excel, PowerPoint, and images in just a few clicks. Acrobat Studio's AI Assistant elevates productivity by generating summaries, extracting key insights, and answering questions with source-linked citations. PDF Spaces introduces a collaborative environment where teams can centralize project files, add notes, and interact with AI across multiple document types. The Generate Presentation feature transforms documents into polished, branded decks using Adobe Express — no design skills required. Integrated e-signature tools enable organizations to send, collect, and monitor legally binding signatures securely. Security features including password protection, redaction, and restricted editing keep sensitive information protected.

Nutrient offers a comprehensive suite of solutions tailored to meet all your PDF needs, providing tools that effortlessly handle PDF functionalities on any platform. 1. SDK: Integrate sophisticated PDF capabilities into iOS, Android, Windows, the web, or any cross-platform technology, offering features such as PDF viewing, annotation, collaboration, and much more. 2. Libraries: Use our robust .NET and Java libraries to empower your backend systems with capabilities for batch processing of redactions and PDF forms, OCR for scanned text, and editing of PDF documents, all directly from your application server. 3. Processor: Our nimble PDF microservice, Processor, facilitates the quick creation of PDFs from HTML, including HTML forms, alongside conversions from Office to PDF, OCR processing, redaction, and the combination and exporting of XFDF. 4. PDF API: Leverage our hosted PDF API to create, convert, and modify PDF documents within your workflows. We manage the development and server operations, allowing you to focus solely on growing your business. At Nutrient, we see ourselves not merely as a tool but as a dedicated partner in your journey to success. You can easily reach out to our engineers for specialized support, access thorough examples to aid in integration, and utilize our premium documentation to maximize your experience. Additionally, we are committed to continuous improvement and innovation, ensuring our solutions evolve with your needs.

MobiOffice, which was previously known as OfficeSuite, serves as a user-friendly office suite alternative, boasting a user base exceeding 250 million individuals across 195 nations. It is compatible with multiple operating systems including Windows, Android, iOS, and macOS, and features essential applications such as MobiDocs, MobiSheets, and MobiSlides. This suite enables effortless management of text documents, spreadsheets, and presentations, ensuring compatibility with all prominent file formats like Microsoft Office (DOCX, ODT, PPTX), Google (Docs, Sheets, Slides), and Apple iWork among others. Delve into each application: MobiDocs allows for the creation and editing of documents, complete with a wide range of formatting options. MobiSheets is designed to streamline data management and analysis, enabling users to visualize insights and generate reports with ease. MobiSlides helps in creating captivating presentations through customizable templates and multimedia support. Additionally, MobiOffice seamlessly integrates with MobiDrive, the cloud storage service from MobiSystems, facilitating effortless document storage and synchronization. You can take advantage of a 7-day free trial to discover how this office suite can cater to your specific requirements. Optimized for all major platforms, MobiOffice offers its components—MobiDocs, MobiSheets, and MobiSlides—either as a comprehensive suite or as individual applications on Windows, providing customized and cost-effective solutions to meet diverse user demands. Furthermore, its user-friendly interface ensures that even those new to office suites can navigate the software with confidence.

Nitro PDF is a leading PDF editing solution that combines powerful features with user-friendly design to streamline document workflows for individuals, teams, and enterprises. It allows users to easily create, edit, convert, annotate, and secure PDFs, supporting complex tasks like OCR, digital signing, and document automation. The software interface is familiar and intuitive, closely mimicking Microsoft Office’s ribbon on Windows and Apple’s toolbar on Mac, facilitating fast user adoption and minimizing training time. Nitro PDF integrates seamlessly with popular platforms such as Microsoft 365, SharePoint, and iManage, enhancing productivity across workflows. Security and compliance are foundational, with Nitro holding internationally recognized certifications including SOC 2, HIPAA, QTSP, and ISO 27001, ensuring the highest levels of data protection. Nitro’s AI-powered tools further boost productivity by automating routine tasks and providing instant assistance via its Knowledge Assistant, available 24/7 in over 80 languages. The company offers a range of flexible pricing options, from subscription plans tailored for small teams and individuals to enterprise-grade solutions with advanced security features and dedicated support. Nitro’s customer success team supports clients throughout installation, rollout, and beyond, guaranteeing a smooth transition and continued growth. Trusted by global industry leaders across real estate, healthcare, manufacturing, and more, Nitro PDF enables organizations to reduce costs while enhancing document security and efficiency. Overall, Nitro PDF provides a comprehensive, secure, and scalable solution that modernizes how businesses handle digital documents.

Take advantage of our complimentary Adobe Acrobat Reader to effortlessly view, sign, collaborate on, and annotate your PDF files. With this tool, you can not only view and sign documents but also collect feedback and share PDFs for free. If you wish to enhance your experience, you can subscribe to Acrobat Pro, which provides additional features such as editing, exporting, and sending PDFs for signature requests. Move beyond simply opening and viewing your PDF files; it's easy to annotate your documents and gather input from multiple reviewers into a single shared online PDF. The Acrobat Reader mobile app allows you to conveniently work on your documents from anywhere, equipped with essential tools for converting, editing, and signing PDFs. Moreover, the app lets you use your device's camera to scan documents, whiteboards, or receipts and turn them into PDFs. By connecting to Adobe Document Cloud, Acrobat Reader guarantees that your work with PDFs is accessible no matter where you are, and you can easily manage your files on platforms such as Box, Dropbox, Google Drive, or Microsoft OneDrive. This smooth integration offers a flexible and efficient workflow, enhancing your document management experience like never before, ensuring your productivity remains uninterrupted. Thus, whether you're working on a personal project or collaborating with a team, Adobe Acrobat Reader provides a comprehensive solution for all your PDF needs.

Haihaisoft Reader is a free PDF reader and printer that features an impressively fast startup time and a wide array of functionalities. It is specifically designed to manage PDF files that are secured with the DRM-X platform. This application supports multiple operating systems, such as Windows, Mac, Android, and iPhone/iPad. Users can easily read and print any Adobe PDF documents, including those that feature protection from Adobe Acrobat. Notably, the download size for Haihaisoft Reader is only 3 MB, making it much smaller than Adobe Reader. Committed to user security and privacy, Haihaisoft PDF Reader ensures that personal information remains protected and does not connect to the Internet without the user's explicit consent. To enhance privacy further, the application does not automatically check for updates online; users can simply click a button in the help menu to check for and install updates at their convenience. Additionally, the DRM-X platform enables users to set various permissions for rights management, facilitating secure document sharing. In conclusion, Haihaisoft Reader not only prioritizes efficiency and security but also emphasizes user-friendliness, all within a compact and lightweight application. This makes it an excellent choice for anyone seeking a reliable PDF reader.

Ennov Doc is a component of Ennov's ECM platform tailored for regulated industries, particularly within the Life Sciences Sector. This solution has earned recognition from Gartner as a significant player in the Life Sciences field, highlighted in their Hype Cycle for Life Sciences Reports as a Regulated SaaS EDMS, in addition to its mentions for eTMF and QMS, making it suitable for both large and smaller organizations. It integrates various functionalities within a single interface, including Document Management (EDMS), Business Process Management (BPMS), Dossier Management, Report Management, and ensures Traceability and Security compliant with 21 CFR part 11. The platform features a user-friendly, entirely web-based interface that facilitates straightforward deployments and fosters high levels of user adoption. Furthermore, a standout characteristic of the document management system is its "metadata-oriented" approach, allowing for customizable navigation and search capabilities that rely on metadata instead of traditional folder structures. As a result, users can efficiently locate documents based on their content rather than their physical location, enhancing productivity and streamlining workflows. This focus on intuitive design and flexible document retrieval further cements Ennov Doc as an essential tool for organizations in the regulated industries.

A free PDF converter enables users to transform files from PDF format to various other formats. Users can also convert files into PDF from formats like Word, JPG, ePub, and more. The tool allows the merging of multiple files into a single PDF document and offers customizable output settings. Additionally, it facilitates the conversion of PDFs to editable formats such as DOC and JPG. Icecream PDF Converter is capable of handling password-protected files and includes an integrated PDF reader for convenience. This PDF converter is compatible with several operating systems, including Windows 10, 8, 7, and XP. It supports batch processing, allowing you to add numerous files to the conversion queue and process them all simultaneously with a single click. For creating editable Word documents, the software can recognize text in scanned PDF files, making it easier to extract information. Users can customize the output by selecting page size, margins, and orientation, as well as rotating and positioning content when converting images like JPG and TIFF. When converting PDF files to images, you can also specify page ranges for more precise results. Furthermore, it enables the merging of multiple documents or images into one cohesive PDF file, accommodating files of any size for seamless transitions in and out of PDF format. The versatility of the free PDF converter makes it an essential tool for anyone needing to manage their document formats effectively.