Compress .pptx files by optimizing slide images — reduce size by up to 70%
Drag & drop or click to select PowerPoint files
Only .pptx supported (max 200MB)
• 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
Compress PowerPoint (.pptx) files online for free by optimizing slide images. Reduce PowerPoint file size by up to 70% while keeping all content, animations, and effects intact. Especially useful for presentations with many high-quality images. Supports files up to 200MB. Batch compression — process multiple files at once.
Large PowerPoint files are slow to email, upload to cloud storage, and share with colleagues. Presentations with many high-resolution images can easily exceed 50-100MB. Compressing reduces file size by optimizing the embedded images — the most common cause of large PPTX files. The compressed file opens normally in PowerPoint, Google Slides, and LibreOffice Impress with all animations and transitions intact.
A .pptx file is a ZIP archive containing XML files and media (images in the ppt/media/ folder). The compressor extracts each image, resizes it if it exceeds the max width, converts it to JPEG or WebP, removes EXIF metadata, and repackages the file. Text, shapes, animations, and transitions are not affected — only the embedded images are optimized.
Yes. The compressed file is a valid .pptx and opens normally in PowerPoint, Google Slides, and LibreOffice Impress.
Yes. Only images inside slides are compressed. All animations, transitions, text, and shapes remain intact.
Up to 200MB per file. For larger files, consider splitting the presentation into sections first.
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.
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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