Compress DOCX Files Online
Reduce Word document sizes while keeping your content intact. Perfect for email attachments and file sharing.
Drop a DOCX file here or click to browse
Microsoft Word documents (.docx)
Re-compress DOCX ZIP structure for smaller files
Optimize embedded images with adjustable quality
Three compression levels to choose from
100% client-side — files never leave your device
No file size limits for compression
No watermarks, no sign-up required
Frequently Asked Questions
How does DOCX compression work?
DOCX files are ZIP archives containing XML, images, and other media. Compresso re-compresses the ZIP with better settings and optionally downscales embedded images to reduce overall file size.
How much can I reduce my DOCX file size?
Results depend on the document content. Files with many embedded images can see 30–60% size reduction. Text-heavy documents with few images may see 5–15% reduction from better ZIP compression alone.
What's the difference between compression levels?
Low compression re-zips the archive with better settings only. Medium adds image optimization at 80% JPEG quality. High uses aggressive image compression at 60% quality and strips document metadata.
Will compression affect my document's content?
Text and formatting are always preserved. Low compression makes no changes to content. Medium and high compression may slightly reduce embedded image quality, but the document remains fully editable in Word.
Is it safe to compress DOCX files with Compresso?
Absolutely. Everything is processed in your browser — your files are never uploaded to any server. Your documents stay completely private on your device.
Can I compress password-protected DOCX files?
Encrypted DOCX files are not currently supported. Please remove the password protection first, then compress.