Quick Answer
wpspdfviewer.exe is safe. It's WPS Office's PDF viewer component that renders PDFs within the suite, handling pages, annotations, and printing tasks with a modular, multi-process approach.
Is it a Virus?
✔ NO - Safe
Must be in C:\Program Files\Kingsoft\WPS Office\11.2.0.12514\wpspdfviewer.exe
Can I Disable?
⚠ YES - You can disable, but PDFs may not open in WPS Office until re-enabled.
Disabling may stop PDF rendering in WPS Office apps
Can I Uninstall?
✔ YES - You can uninstall WPS Office or this component if desired.
You can remove the component by uninstalling WPS Office or disabling the PDF viewer component in some custom install options
What is wpspdfviewer.exe?
wpspdfviewer.exe is the Windows executable that powers the PDF viewing component of WPS Office. It runs alongside other WPS Office modules to render PDF documents within the app, support annotations, form filling, and printing. The process can spawn extra sub-processes for rendering and plugins.
WPS PDF Viewer employs a multi-process architecture to isolate rendering, annotations, and printing tasks. Each page render may run in its own process or thread, keeping the user interface responsive and reducing crash impact.
Quick Fact: WPS Office PDF viewer uses a modular, multi-process architecture to isolate rendering tasks from the UI for better stability and security.
Types of WPS PDF Viewer Processes
- Viewer Process: Main UI, navigation, and control logic for PDFs
- Renderer Process: Page rendering for each document page
- Annotation Process: Rendering and handling of annotations and form fields
- Printing Process: Print job handling and spooler interaction
- Plugin Process: Integrations for PDFs with extended features (forms, media)
- Utility Process: Background tasks and network services related to PDFs
Is wpspdfviewer.exe Safe?
Yes, wpspdfviewer.exe is safe when it's the legitimate file from Kingsoft/WPS Office downloaded from official sources (wps.com or official installer).
Is wpspdfviewer.exe a Virus or Malware?
The real wpspdfviewer.exe is NOT a virus. However, malware sometimes disguises itself using similar names to trick users.
How to Tell if wpspdfviewer.exe is Legitimate or Malware
- File Location:: Must be in
C:\Program Files\Kingsoft\WPS Office\11.2.0.12514\wpspdfviewer.exe or C:\Program Files (x86)\Kingsoft\WPS Office\11.2.0.12514\wpspdfviewer.exe. Any wpspdfviewer.exe elsewhere is suspicious.
- Digital Signature:: Right-click the file in Explorer → Properties → Digital Signatures. Should show certificate from "Kingsoft Office Software Corporation".
- Resource Usage:: Normal usage is 2-15% CPU and 120-300 MB memory per PDF task. Constant high usage or no digital signature is suspicious.
- Behavior:: The legitimate viewer runs when you open PDFs in WPS Office or via the PDF Viewer tool. It should not launch when the PDF viewer is not needed.
Red Flags: If wpspdfviewer.exe is located in unusual folders (like Temp or AppData), runs when PDFs aren't open, has no digital signature, or uses excessive resources constantly, scan your system with antivirus software immediately. Beware of similarly-named files from untrusted sources.
Why Is wpspdfviewer.exe Running on My PC?
wpspdfviewer.exe runs when you open a PDF in WPS Office or when WPS Office is configured to preview PDFs in the background.
Reasons it's running:
- Active PDF Viewing: You're viewing or editing a PDF—each document uses the viewer to render pages and display UI.
- Background Preview: WPS Office may keep the PDF viewer running to enable quick previews or in-app annotations.
- Startup Launch: WPS Office components may start wpspdfviewer.exe on Windows startup for faster access.
- Background Sync: The viewer may participate in background sync of recent PDFs or cloud-stored documents.
- Auto-Update Checks: During auto-update checks, components may briefly spawn the viewer to validate assets.
Can I Disable or Remove wpspdfviewer.exe?
Yes, you can disable wpspdfviewer.exe. It’s safe to close PDFs, but disabling may impact PDF viewing, annotations, and printing within WPS Office.
How to Stop wpspdfviewer.exe
- End PDF tasks: In WPS Office, close all open PDFs and editor instances to stop the viewer from rendering.
- Close WPS Office: Exit all WPS Office apps to terminate the viewer processes.
- Disable Startup: Task Manager → Startup tab → Disable WPS Office components that launch on startup.
- Manage Background Apps: In WPS Office Settings → General → Background tasks, disable PDF background preview if available.
- Uninstall or Repair: Control Panel / Settings → Apps → WPS Office → Uninstall or choose Repair to remove problematic components.
How to Uninstall WPS Office (or this component)
- ✔ Windows Settings → Apps → Apps & Features → WPS Office → Uninstall
- ✔ Control Panel → Programs → Programs and Features → WPS Office → Uninstall
- ✔ Consider alternative PDF tools: Adobe Acrobat, Foxit, or built-in Windows PDF viewer
Common Problems: High CPU or Memory Usage
If wpspdfviewer.exe is consuming excessive resources while rendering PDFs:
Common Causes & Solutions
- Too many PDFs or large, image-heavy documents: Close extra PDFs; try reducing image quality or use two-stage rendering
- Background preview enabled: Disable background previews in WPS Office settings
- Outdated WPS Office version: Update to the latest release to get efficiency improvements
- Corrupted cache or profile: Clear WPS Office cache and reset user profile if necessary
- Problematic plugins/add-ins: Disable or remove plugins that interact with PDF viewing
- Hardware acceleration issues: Toggle hardware acceleration in WPS Office settings
Quick Fixes:
1. Quick Fixes:
2. 1. Close unused PDFs and annotate sparingly; limit heavy PDF tasks
3. 2. Clear WPS Office cache: Settings → Advanced → Clear Cache
4. 3. Update WPS Office to the latest version
5. 4. Disable unnecessary plugins in WPS PDF Viewer
6. 5. Reset PDF viewing settings to default
7. 6. If needed, disable background PDF previews in settings
Frequently Asked Questions
Is wpspdfviewer.exe a virus?
Yes, the legitimate wpspdfviewer.exe from Kingsoft/WPS Office is not a virus. Verify the file path is within C:\Program Files\Kingsoft\WPS Office and that it has a valid digital signature from Kingsoft.
Why is wpspdfviewer.exe using so much CPU?
High CPU usage is usually caused by rendering large PDFs, complex graphics, or numerous open documents. Use WPS PDF Viewer Task Manager (if available) to identify the culprit, close it, update WPS Office, and scan for malware.
Can I delete wpspdfviewer.exe?
Yes, you can uninstall WPS Office via Windows Settings if you no longer need it. Your PDFs stored locally remain on disk, but some in-app settings may be reset.
Can I disable wpspdfviewer.exe?
Yes, you can influence its startup behavior. To stop it from launching at startup, disable WPS Office in Task Manager → Startup, or uninstall the suite.
Why is wpspdfviewer.exe running at startup?
wpspdfviewer.exe runs as part of WPS Office's PDF features. If it starts at Windows startup, you can disable startup entries; this won't uninstall the PDF viewer but will prevent auto-launch.
Why are there so many wpspdfviewer processes?
The viewer uses a multi-process approach for stability; tabs/pages and plugins run in separate processes. This minimizes crashes spreading and keeps UI responsive.
How do I reduce wpspdfviewer.exe memory usage?
To reduce memory usage, close unused PDFs, disable unnecessary plugins, clear cache, and consider enabling memory saver features in WPS Office if available.