To reduce a large Word document, first save a copy, then compress its pictures in desktop Word. Images, retained crop data, and embedded fonts often account for more space than the text. The amount saved depends on what is actually in the file, so compare the file sizes before and after rather than expecting a fixed percentage.
Save a copy and find the likely cause
- In Word, choose File > Save As or Save a Copy and give the working file a new name. Keep the original if you may need full-resolution images later.
- Check the file size in File Explorer or Finder. Note whether the document contains many photos, screenshots, charts, or embedded objects.
- Confirm the file type. If you are working in the older .doc format, save the copy as .docx and compare sizes. A file that is already .docx will not gain anything from choosing .docx again.
Removing a few ordinary paragraphs rarely makes a noticeable difference in a picture-heavy document. Start with the largest images and keep any image that readers need to understand the content.
Compress pictures in Word for Windows
- Open the copied document and select one picture. The Picture Format tab appears.
- Choose Compress Pictures in the Adjust group. If you want all pictures compressed, clear Apply only to this picture. Leave it selected when only the chosen picture should change.
- Choose a resolution appropriate for the destination. A document used mainly on screen can often use a lower resolution than one intended for high-quality printing. Preview detailed charts, fine text in screenshots, and photos before accepting a lower setting.
- Select Delete cropped areas of pictures only if you no longer need to uncrop them. This removes hidden image data and makes that crop unrecoverable from the compressed copy.
- Save the file, close and reopen it, and check both its size and the appearance of its pictures.
On Mac, Microsoft also documents File > Compress Pictures to work on all pictures, or Picture Format > Compress Pictures for selected ones. Picture compression is a desktop Office feature; it is not available in Microsoft 365 for the web.
Check picture quality and embedded fonts
In Word for Windows, File > Options > Advanced > Image Size and Quality contains settings for the selected document. If Do not compress images in file is selected, turn it off when you intend to compress pictures. Discard editing data can save space but removes information used to reverse picture edits, so keep the untouched copy. Lowering the default resolution affects the document’s image handling; inspect the output after saving.
Embedded fonts can also enlarge a file. Under File > Options > Save, inspect the font-embedding setting. Turn embedding off only if the recipients can use substitute or installed fonts without harming the layout. If exact typography is essential, keep the fonts embedded or make a PDF for viewing. Microsoft also offers options to embed only used characters and omit common system fonts.
If the document is still large
- Mostly text: There may be little to gain from picture compression. Do not strip necessary content just to chase a smaller file.
- Detailed screenshots look fuzzy: Return to the original copy and choose a higher resolution or compress only photos, not screenshots with small text.
- Many embedded objects: Check whether an embedded spreadsheet or other object is needed in editable form; a linked or static representation can behave differently for recipients.
- Sharing limit remains: Share the document from a permitted cloud location if appropriate for the material, or send a PDF when recipients only need to read it. Avoid uploading confidential documents to an unknown compression site.
Record the original and revised file sizes, then open the final copy and verify pictures, fonts, tables, and page breaks. See Microsoft’s Word file-size guidance and our guide to saving a Word document.
Matt has been writing about Microsoft Windows and other Microsoft products since the days of Windows XP. He spends much of his time writing for sites like WindowBrain.com