Word may slow down, freeze, or crash when it uses too much RAM. High memory consumption often happens with large documents, embedded media, or corrupted add-ins. This article explains how to identify the exact cause of high memory usage in Word and reduce it without losing your work.
Key Takeaways: Diagnose and Reduce Word Memory Usage
- Task Manager > Processes > Memory column: Sort Word’s memory usage in real time to see the exact MB consumed.
- File > Options > Add-ins > Go > Disable COM add-ins: COM add-ins like PDF converters or grammar checkers often leak memory; disable them one by one.
- File > Options > Advanced > Display > Disable hardware graphics acceleration: Stops Word from using excessive GPU memory when rendering complex documents.
Why Word Memory Usage Spikes
Word loads the entire document into RAM when you open it. A 50-page document with high-resolution images, embedded charts, or tracked changes can use 500 MB or more. Add-ins, especially COM add-ins, can double that amount by running background processes that do not release memory. Corrupted Normal.dotm template files also cause memory leaks over time. Word’s 32-bit version has a 2 GB memory limit on Windows, so once usage approaches that limit, the program becomes unstable.
How Word Allocates Memory
Word uses a private working set for the document content and a shared working set for the application itself. Images are held as uncompressed bitmaps in memory, so a single 10 MB JPEG expands to roughly 50 MB when displayed. Embedded objects such as Excel charts or PDF attachments also consume extra RAM because Word keeps a copy of the source file in memory.
Common Memory Hogs in Word
The top causes of high memory usage are large image files, complex tables with merged cells, extensive tracked changes and comments, embedded OLE objects, and third-party add-ins that do not unload properly. Word’s AutoRecover feature also writes temporary files to disk, but the memory used during the save process is released afterward.
Steps to Investigate and Reduce Memory Usage in Word
Follow the steps below in order. Each step isolates a different potential cause.
Step 1: Check Current Memory Usage in Task Manager
- Open Task Manager
Press Ctrl+Shift+Escape on your keyboard. If Task Manager opens in compact view, click More details at the bottom. - Find Word in the Processes list
Look under the Apps section for Microsoft Word. If you have multiple documents open, you will see a single process named Microsoft Word with a memory value in MB. - Sort by memory
Click the Memory column header to sort processes from highest to lowest memory usage. Note the current value for Word. A healthy reading for a medium document is under 300 MB. Readings above 800 MB indicate a problem.
Step 2: Disable All Add-ins
- Open Word Add-ins dialog
Go to File > Options > Add-ins. At the bottom of the dialog, next to the Manage drop-down, select COM Add-ins and click Go. - Uncheck every add-in
Clear all checkboxes in the COM Add-ins dialog. Click OK and restart Word. - Verify memory drop
Open the same document and check Task Manager again. If memory usage drops by 200 MB or more, one of the add-ins was leaking memory. Re-enable add-ins one at a time to identify the culprit.
Step 3: Disable Hardware Graphics Acceleration
- Open Advanced Options
Go to File > Options > Advanced. - Turn off graphics acceleration
Scroll to the Display section. Check the box labeled Disable hardware graphics acceleration. Click OK and restart Word. - Test the document
Open the same document. Graphics acceleration offloads rendering to the GPU, but on systems with limited video RAM, this can cause memory spikes. You may lose some visual effects like smooth scrolling, but memory usage should stabilize.
Step 4: Convert Images to Lower Resolution
- Open Compress Pictures
Select any image in the document. On the Picture Format tab, click Compress Pictures. - Apply to all images
In the Compress Pictures dialog, uncheck Apply only to this picture. Choose Email (96 ppi) for the smallest file size. Click OK. - Save and reopen the document
Press Ctrl+S to save, then close and reopen the document. Memory usage for the document should drop by 30 to 50 percent.
Step 5: Reset the Normal.dotm Template
- Close Word completely
Make sure no Word process is running. Check Task Manager if needed. - Locate the template folder
Press Windows+R, type%appdata%\Microsoft\Templates, and press Enter. - Rename Normal.dotm
Right-click Normal.dotm and choose Rename. Type OldNormal.dotm and press Enter. Word will create a fresh template when you restart it. - Restart Word and test
Open Word and the same document. A corrupted template can cause memory leaks over time. If memory usage is lower, you fixed the issue.
If Word Still Has High Memory Usage
If the steps above did not reduce memory usage, the document itself may be damaged or contain very large embedded objects. Try the following additional fixes.
Word Freezes When Opening a Document With Embedded Objects
Embedded files like Excel spreadsheets or PDFs are loaded into memory as separate objects. Double-click each embedded object in the document and close it. If memory usage drops, remove the object and insert a linked version instead. To link, go to Insert > Object > Create from File and check Link to file.
Word Memory Usage Grows Over Time While Editing
This is usually caused by tracked changes and comments. Go to Review > Accept > Accept All Changes. Then go to Review > Delete > Delete All Comments. Save the document and check memory usage again.
Word Shows Out of Memory Error on a Small Document
If a small document triggers an out-of-memory error, the 32-bit version of Word may be hitting its 2 GB limit. Close all other applications. If the error persists, switch to the 64-bit version of Microsoft 365. Go to File > Account > About Word to see which version you have. To install the 64-bit version, uninstall Office and reinstall using the 64-bit installer from your Microsoft account portal.
Word 32-Bit vs 64-Bit: Memory Limits and Performance
| Item | Word 32-Bit | Word 64-Bit |
|---|---|---|
| Maximum usable RAM | 2 GB on Windows | Up to 128 TB (limited by system RAM) |
| Compatibility with old add-ins | Works with all 32-bit COM add-ins | Requires 64-bit add-ins; breaks many older COM add-ins |
| Memory usage with large documents | Frequent out-of-memory errors above 1.5 GB | Stable even with documents using 4 GB or more |
| Recommended for | Users with few add-ins and documents under 200 MB | Users with large documents, embedded media, or complex tables |
High memory usage in Word is almost always caused by add-ins, large images, or the 32-bit version limit. Use Task Manager to measure the exact memory consumption, then disable add-ins and compress images. If the problem continues on a small document, switch to Word 64-bit for a permanent solution. You can also automate image compression by using the File > Options > Advanced > Image Size and Quality setting to set a default resolution for all new documents.