Compress PPTX

1. Upload your PPTX (up to 50 MB).
2. Choose a compression level.
3. Click 'Compress PPTX' — takes 5-15 seconds.
4. Download the smaller PPTX.

PPTX presentations balloon quickly with embedded images, videos, and audio. Compressing optimizes these assets — typically 40-70% smaller with no change to slides or content.

PowerPoint presentations are often huge because of embedded high-resolution images, videos, and audio — a 50 MB PPTX usually contains 40+ MB of media. Our compressor optimizes these assets: downsampling oversized images, re-encoding media at efficient quality. All slides, text, animations, and layout are preserved losslessly.

The compressor unpacks the PPTX archive, downsamples oversized embedded images to screen-appropriate resolution, re-encodes them efficiently, strips unused master slides and thumbnail caches, and re-packs the PPTX. All slide content, text, and layout are preserved losslessly.

• Emailing large PowerPoint presentations.
• Uploading PPTX to systems with size limits.
• Reducing cloud storage costs for a PPTX archive.
• Preparing decks for web download.
• Meeting upload caps on LMS or conference portals.
• Shrinking image-heavy presentations.
• Optimizing PPTX files for mobile sharing.

Slides, text, and layout are preserved 100% losslessly. Only embedded images are affected. At Medium level, images look identical on screens; for projection or print, use Low.

• Only PPTX supported (not legacy PPT).
• Embedded videos may not compress as much as images.
• Animations are preserved but not optimized further.
• Very small PPTX files (under 200 KB) may not benefit.
• Speaker notes are preserved (not stripped).
• Encrypted PPTX must be unlocked first.

• Output PPTX opens in Microsoft PowerPoint 2007+.
• Opens in Google Slides, LibreOffice Impress, Keynote.
• All slides and formatting preserved.
• Standard PPTX — no special software needed.
• Accepted by every presentation platform.

• Medium is the sweet spot — 40-55% smaller with no visible loss.
• For image-heavy decks, High or Maximum achieves the most.
• Slides and layout are always preserved losslessly.
• Keep the original PPTX if you may need revision history.
• For legacy PPT files, convert to PPTX first.

PPTX is barely smaller

The PPTX may already be optimized. Try Maximum level. Presentations with mostly text have little to compress.

Images look softer after compression

Use a lower compression level (Low) to preserve image quality.

Embedded videos are still large

Videos are harder to compress than images. For significant reduction, remove or replace embedded videos.

• Microsoft — Office Open XML