Compress PPTX
Reduce PowerPoint file size by optimizing embedded images and media.
or drop files here
Maximum file size: 200MB per file
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Learn more about this tool
About PPTX Compression
PPTX files are ZIP archives containing slides, images, and embedded media. Our tool opens the PPTX archive, optimizes embedded images by re-encoding at appropriate quality, and removes unnecessary metadata. This can significantly reduce file size without affecting the presentation content. All processing happens in your browser. Whether you are preparing bilingual English and French documents, submitting files to CRA and Service Canada, or collaborating cross-border with US teams, this tool keeps your files lean and aligned with Canadian privacy expectations — nothing leaves your device.
Frequently Asked Questions
How does PPTX compression work?
PPTX files are ZIP archives. Our tool extracts the archive, re-encodes embedded images at optimized quality, removes unnecessary metadata, and repackages the presentation.
Will the presentation look the same?
Slide layout, text, transitions, and animations remain intact. Only embedded images are re-encoded. The presentation will look the same when opened.
How much can I reduce PPTX file size?
Presentations with many high-resolution images can be reduced by 50-90%. Text-heavy presentations see smaller reductions.
Is this PPTX compressor free?
Yes, completely free with no limits. Process as many PPTX files as you need, no registration required.
References & Resources
Authoritative specifications and references for the file formats this tool works with.