PowerPoint Compressor - Compress PPTX Files Online

Compress .pptx files by optimizing slide images — reduce size by up to 70%

Image quality: 80%

Image format

Max width

Drag & drop or click to select PowerPoint files

Only .pptx supported (max 200MB)

💡 How it works

• A .pptx file is a ZIP archive containing XML and media (images in slides)

• The tool extracts and optimizes each image in the ppt/media/ folder

• Resizes oversized images and removes EXIF metadata

• Converts to JPEG/WebP to reduce file size

• Updates relationships in .rels files

• Repackages as .pptx with compression level 9

Free Online PowerPoint Compressor - Compress PPTX Files

Compress PowerPoint (.pptx) files online for free by optimizing slide images. Reduce PowerPoint file size by up to 70% while keeping all content and effects intact. Especially useful for presentations with many high-quality images.

Key Features

Compress PowerPoint by up to 70%

Optimize images in slides

Resize oversized images

Convert to JPEG/WebP

Preserve animations and transitions

Supports files up to 200MB

Frequently Asked Questions

Will the result still open in PowerPoint?

Yes. The compressed file is a valid .pptx and opens normally in PowerPoint, Google Slides, and LibreOffice Impress.

Are animations and transitions preserved?

Yes. Only images inside slides are compressed. All animations, transitions, text, and shapes remain intact.

What is the maximum file size?

Up to 200MB per file. For larger files, consider splitting the presentation into sections first.

Why is JPEG better than keeping the original format?

Many presentations contain PNG or BMP images which are much larger than JPEG. Converting to JPEG at 80% quality reduces size significantly with minimal visible quality loss.

Is my file uploaded to a server?

The file is sent to our server for processing via the /api/compress-powerpoint endpoint, then immediately deleted after compression. The compressed file is returned as a download.

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