Introduction
SumatraPDF and MPP Viewer are both lightweight Windows-oriented applications for working with documents, but their purposes are fundamentally different. SumatraPDF is a general-purpose document and PDF reader, while MPP Viewer is designed specifically for opening and viewing Microsoft Project .mpp files.
The SumatraPDF vs MPP Viewer comparison is therefore less about two competing PDF tools and more about two specialized viewing applications. SumatraPDF supports PDF, ebooks, comics, XPS, DjVu, and other formats, while MPP Viewer focuses on project schedules, tasks, resources, and timelines stored in Microsoft Project files.
SumatraPDF vs MPP Viewer: Quick Comparison
| Feature | SumatraPDF | MPP Viewer |
| Primary purpose | PDF and document viewing | Microsoft Project file viewing |
| Main file type | PDF and multiple document formats | MPP |
| Category | Lightweight document reader | Project-file viewer |
| Primary platform | Windows | Windows |
| PDF support | Yes | Not its primary purpose |
| MPP support | No | Yes |
| Gantt charts | No | Yes |
| Task hierarchy | No | Yes |
| Resource information | No | Yes |
| Project timeline viewing | No | Yes |
| Printing | Yes | Yes |
| Export capabilities | Available through supported tools/workflows | Export/printing options depend on version |
| Programming required | No | No |
| Internet required | No for normal local viewing | No |
| Best suited to | Reading PDFs and other documents | Reviewing Microsoft Project plans |
What Is SumatraPDF?
SumatraPDF is an open-source, lightweight document reader primarily designed for Windows. PDF is its central format, but the application also supports ebooks, comics, XPS, DjVu, CHM, images, and several other document types.
Its main functions include:
- Opening and viewing PDFs
- Searching document text
- Navigating pages
- Printing
- Viewing ebooks
- Reading comic-book formats
- Opening XPS and DjVu files
- Working with supported image formats
- Portable operation
Recent SumatraPDF tooling also includes command-line capabilities for operations such as conversion, extraction, searching, and other document-processing tasks.
What Is MPP Viewer?
MPP Viewer is a specialized application for opening and viewing Microsoft Project .mpp files without requiring Microsoft Project itself.
The MPP Viewer software identified for this comparison supports project files associated with several Microsoft Project generations and provides views such as hierarchical tasks and resource information.
Typical capabilities include:
- Opening .mpp project files
- Viewing hierarchical task structures
- Reviewing task relationships
- Viewing project resources
- Inspecting project schedules
- Printing project information
- Exporting or sharing project information, depending on the version
MPP files can contain project tasks, resources, schedules, and related planning information, so an MPP viewer needs to interpret project-management data rather than simply render a conventional document page.
The Fundamental Difference
The most important distinction is the type of content each application is designed to display.
SumatraPDF is a general document viewer.
MPP Viewer is a Microsoft Project file viewer.
Document Viewing
│
┌──────────┴──────────┐
│ │
SumatraPDF MPP Viewer
│ │
PDFs, ebooks, etc. .MPP projects
│ │
▼ ▼
Pages and documents Tasks, resources,
schedules, timelines
This means their file compatibility and viewing models are substantially different.
Core Feature Comparison
SumatraPDF Features
SumatraPDF is built around lightweight document consumption.
Important features include:
- PDF viewing
- Text search
- Page navigation
- Zoom
- Printing
- Table-of-contents navigation
- Ebook support
- Comic-book support
- XPS and DjVu support
- Portable use
Its supported-format list includes PDF, EPUB, MOBI, FB2, CBZ, CBR, CHM, XPS, DjVu, Markdown, and numerous image formats.
MPP Viewer Features
MPP Viewer concentrates on Microsoft Project information.
Its functionality can include:
- MPP file opening
- Hierarchical task display
- Resource views
- Project schedule inspection
- Task relationships
- Printing
- Project information export
The exact capabilities can vary by MPP Viewer release.
File Format Compatibility
SumatraPDF
SumatraPDF supports a broad selection of document formats.
Examples include:
- EPUB
- MOBI
- FB2
- XPS
- DjVu
- CHM
- CBZ
- CBR
- Markdown
- Images
This makes it useful when a single lightweight reader needs to handle different types of reading material.
MPP Viewer
MPP Viewer has a much narrower format focus.
Its primary purpose is opening files created by Microsoft Project. The MPP Viewer product page lists compatibility with several Microsoft Project file generations, including Project 2000, 2003, 2007, and 2016.
It is therefore specialized rather than multi-format.
PDF Viewing
SumatraPDF
PDF viewing is one of SumatraPDF’s primary functions.
Users can:
- Open PDF documents
- Search for text
- Navigate pages
- Zoom
- Follow bookmarks and document structure
It is designed for direct interactive reading.
MPP Viewer
MPP Viewer is not designed as a general PDF reader. Its focus is Microsoft Project data rather than page-based PDF documents.
If a project manager exports a project plan to PDF, a dedicated PDF viewer such as SumatraPDF can be used to view that exported document.
Project Management Data
SumatraPDF
SumatraPDF can display a project report if it has been exported to a supported format such as PDF, but it does not interpret the underlying project structure.
For example, it cannot inherently understand:
- Task dependencies
- Project resources
- Task hierarchy
- Project schedules
when those details exist inside an . file.
MPP Viewer
MPP Viewer is designed specifically to interpret this type of project information.
Depending on the version, users can inspect:
- Tasks
- Subtasks
- Hierarchies
- Resources
- Dates
- Project schedules
- Dependencies and related project information
This makes it substantially different from a conventional document viewer.
Gantt Charts and Timelines
SumatraPDF
SumatraPDF can display a Gantt chart if the chart has been exported into a supported document or image format.
However, it does not understand the Gantt chart as an editable or structured project view.
MPP Viewer
MPP Viewer can present Microsoft Project information in project-oriented views, including hierarchical task information and scheduling data. Some MPP viewers also provide Gantt-style visualization depending on the product and version.
This distinction matters when users need to inspect the underlying project plan rather than simply look at a static image of it.
Performance Comparison
SumatraPDF Performance
SumatraPDF is designed to be lightweight and responsive during document viewing.
Its performance characteristics include:
- Fast document loading
- Efficient page rendering
- Low overhead
- Responsive navigation
- Support for large documents within the capabilities of the system
Actual performance depends on the complexity and size of the document.
MPP Viewer Performance
MPP Viewer performance depends on the size and complexity of the project file.
Factors can include:
- Number of tasks
- Number of resources
- Task dependencies
- Project duration
- Complexity of project structures
- Version of the MPP format
Large project plans may require more processing than a simple PDF or document.
Because the applications process fundamentally different data structures, direct CPU or RAM comparisons are not especially meaningful.
Resource Usage
SumatraPDF is designed around lightweight document viewing.
MPP Viewer is also intended to be relatively focused, but parsing an MPP file can involve processing structured project information rather than simply rendering pages.
Resource usage in MPP Viewer can therefore vary according to the complexity of the project being opened.
Compatibility
SumatraPDF
SumatraPDF is primarily Windows-based and supports a broad range of document formats.
It is suitable for users who regularly work with PDFs and other supported reading formats.
MPP Viewer
The MPP Viewer product referenced here is Windows-oriented and requires a compatible Windows environment. Its listed requirements for version 4.0 include .NET Framework 4.6.2.
The exact compatibility range can vary depending on the MPP Viewer version.
System Requirements
SumatraPDF
SumatraPDF is designed to operate with relatively modest system resources.
A typical setup requires:
- Supported Windows system
- Compatible SumatraPDF release
- Basic storage space
- Sufficient resources for the documents being viewed
Its portable version can be run without a conventional installation.
MPP Viewer
The referenced MPP Viewer version requires:
- Windows
- Compatible MPP Viewer release
- .NET Framework 4.6.2 for version 4.0
- Sufficient CPU and RAM for the project being viewed
The product documentation states that an internet connection is not required for normal standalone use.
Installation and Setup
SumatraPDF
A typical SumatraPDF setup is straightforward:
- Download the appropriate release.
- Install the application or choose its portable version.
- Open a supported document.
- Configure viewing preferences if necessary.
No separate development environment is required.
MPP Viewer
A typical MPP Viewer setup involves:
- Installing a compatible Windows version.
- Ensuring the required .NET Framework version is available.
- Installing MPP Viewer.
- Opening an .mpp project file.
- Selecting the relevant project view.
The exact installation procedure depends on the specific release.
Ease of Use
SumatraPDF
SumatraPDF is designed for straightforward document reading.
It does not require knowledge of PDF internals or project-management software.
Typical users can quickly:
- Open a file
- Search for information
- Navigate pages
- Print documents
- Switch between documents
MPP Viewer
MPP Viewer is similarly focused on viewing rather than full project editing.
However, users benefit from familiarity with project-management concepts such as:
- Tasks
- Milestones
- Resources
- Dependencies
- Project schedules
This is because the application presents structured project information rather than ordinary document pages.
Editing Capabilities
SumatraPDF
SumatraPDF is primarily a viewer rather than a full PDF editor.
It is not intended to replace specialized software for complex PDF editing, form creation, or document-authoring workflows.
MPP Viewer
MPP Viewer is also primarily a viewer.
Its purpose is to inspect existing project files rather than provide the full project planning and editing functionality of Microsoft Project.
Microsoft itself notes that Microsoft Project does not provide a separate dedicated viewer program for opening project files without Project installed, and points users toward alternatives such as exported reports or Project Web App.
Printing and Export
SumatraPDF
SumatraPDF supports printing and has additional command-line tooling for document conversion and extraction in newer development releases.
For example, its command-line tools can convert supported documents into formats such as text, images, SVG, or PDF.
MPP Viewer
MPP Viewer provides printing and export-oriented functionality according to the specific version. The product description emphasizes viewing, exporting, and printing Microsoft Project files.
This can be useful when project information needs to be shared with people who do not have Microsoft Project.
Automation
SumatraPDF
Automation is not the primary purpose of the graphical application, although its newer command-line tools provide functionality for operations such as extraction, conversion, searching, and document processing.
MPP Viewer
MPP Viewer is primarily an interactive project viewer rather than an automation framework.
Its value is generally centered on opening and inspecting project files manually.
Pros and Limitations
SumatraPDF Pros
- Lightweight document viewer
- Fast PDF opening and navigation
- Supports many document formats
- Open-source
- Portable version available
- Useful search and printing features
- Does not require Microsoft Office or Microsoft Project
SumatraPDF Limitations
- Primarily Windows-focused
- Does not natively interpret .mpp project files
- Not a dedicated project-management application
- Limited compared with full PDF editing suites
- Project data must generally be exported to a supported format before SumatraPDF can display it
MPP Viewer Pros
- Designed specifically for .mpp files
- Can work without Microsoft Project
- Provides project-oriented views
- Supports hierarchical task information
- Can display resource information
- Supports printing and export functions depending on version
- Standalone operation does not require a constant internet connection
MPP Viewer Limitations
- Narrower file-format focus
- Primarily intended for viewing rather than full project editing
- Windows-oriented
- Version compatibility can affect which MPP files open correctly
- Some releases require a specific .NET Framework version
- Does not replace the full planning functionality of Microsoft Project
SumatraPDF vs MPP Viewer: Key Differences
1. Primary Purpose
SumatraPDF is a general document viewer, while MPP Viewer is a Microsoft Project file viewer.
2. File Compatibility
SumatraPDF supports numerous reading formats, including PDF, EPUB, MOBI, XPS, DjVu, and comic-book files. MPP Viewer focuses on .mpp project files.
3. Data Structure
SumatraPDF displays page-based documents. MPP Viewer interprets structured project-management data.
4. Project Information
MPP Viewer can present tasks, resources, and project hierarchies. SumatraPDF can only display such information if it has already been converted into a supported document format.
5. Technical Requirements
SumatraPDF is comparatively self-contained. The referenced MPP Viewer 4.0 requires .NET Framework 4.6.2.
6. Use Cases
SumatraPDF is centered on document reading and review, whereas MPP Viewer is centered on reviewing Microsoft Project plans.
Use-Case Comparison
| Use Case | SumatraPDF | MPP Viewer |
| Read PDF files | Strong fit | No |
| Read ebooks | Strong fit | No |
| View comic files | Strong fit | No |
| View XPS/DjVu | Strong fit | No |
| Open .mpp files | No | Strong fit |
| View project tasks | No | Strong fit |
| View project hierarchy | No | Strong fit |
| Review project resources | No | Strong fit |
| Review project schedules | Only as exported documents | Strong fit |
| View Gantt information | Static/exported only | Strong fit |
| Print documents | Strong fit | Strong fit |
| Export project information | Not project-specific | Supported depending on version |
| Full project editing | No | No |
| Lightweight document reading | Strong fit | Not its primary purpose |
Can SumatraPDF and MPP Viewer Be Used Together?
Yes, they can complement each other in a project-document workflow.
For example, a project manager could use MPP Viewer to inspect an .mpp file and export project information to PDF. SumatraPDF could then be used to open and review the resulting PDF.
A simplified workflow could look like this:
Microsoft Project File
│
▼
MPP Viewer
│
┌─────────┴─────────┐
│ │
Project review Export/Print
│
▼
│
▼
SumatraPDF
│
▼
Document review
This demonstrates that the two applications can occupy different stages of the same workflow rather than being direct substitutes.
Which Tool Fits Different Needs?
SumatraPDF-oriented scenarios
SumatraPDF is relevant when the main objective is to:
- Read PDFs
- Review exported project reports
- Open ebooks
- View technical documentation
- Read comic-book formats
- Handle multiple lightweight document formats
- Print supported documents
MPP Viewer-oriented scenarios
MPP Viewer is relevant when the objective is to:
- Open an .mpp file without Microsoft Project
- Review tasks and subtasks
- Inspect project schedules
- View resources
- Examine project hierarchies
- Print or export project information
- Share project plans with users who only need viewing access
Conclusion
SumatraPDF vs MPP Viewer compares two specialized viewing applications with very different purposes. SumatraPDF is a lightweight, multi-format document reader centered on PDFs, ebooks, comics, and other supported formats, while MPP Viewer is a specialized Microsoft Project file viewer designed to interpret project tasks, resources, schedules, and related .mpp information.
Their differences in features, performance, compatibility, requirements, use cases, pros, and limitations make the two tools applicable to different workflows. SumatraPDF is oriented toward general document consumption, while MPP Viewer is oriented toward reviewing structured project plans. Neither is a direct replacement for the other, and the relevant choice depends primarily on whether the source material is a conventional document or a Microsoft Project .mpp file.