Private browser utility

PPTX File Inspector

Find what makes a presentation large and identify its slide dimensions before you compress or convert it.

Your PPTX stays on this device

Analyze a presentation

Accepts valid .pptx files up to 100 MB. Legacy .ppt files are not ZIP packages and are not supported.

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How to read the report

Package facts, not guesses

Media share

A high media share suggests that image recompression may reduce the file. Embedded video and audio can dominate size but are not altered by our compressor.

Aspect ratio

The report reads the exact slide canvas dimensions stored in the presentation and labels common 16:9, 4:3, and 16:10 formats.

Privacy

JSZip reads the package locally. The file, names inside it, and report are not sent to SaveSlide or stored in analytics.

What the PPTX Inspector Tells You

Before you compress, convert, or share a PowerPoint file, it helps to know what is inside it. The PPTX Inspector reads the internal structure of your presentation and gives you a clear breakdown of what is taking up space and how the file is configured.

Metrics You Get

  • Total file size: The exact size of the PPTX file in MB.
  • Slide count: How many slides are in the presentation.
  • Slide canvas dimensions: The exact width and height in EMUs (English Metric Units), converted to a readable format.
  • Aspect ratio: Whether the deck is 16:9 (widescreen), 4:3 (standard), 16:10, or a custom ratio.
  • Media file count: How many images, videos, and audio files are embedded.
  • Media share: What percentage of the total file size is media. A high percentage (80%+) means image compression will likely produce meaningful savings.
  • Media type breakdown: A table showing how many files of each type (JPEG, PNG, GIF, SVG, MP4, etc.) are inside, with their total uncompressed size.
  • Largest media files: An ordered list of the biggest individual media files inside the package, so you can identify what is bloating the deck.

How to Use This Information

  • Before compressing: Check the media share. If it is below 20%, compression will not help much because the bulk of the file is not images. If it is above 70%, the PPTX Compressor should produce good results.
  • Diagnosing large files: If a client or colleague says "this deck is too big to email," inspect it first. You might find a single 15 MB image that can be replaced, or an embedded video that accounts for 80% of the file.
  • Checking aspect ratio: Before a presentation, confirm the deck is 16:9 for modern screens or 4:3 for legacy projectors. Mismatched ratios cause black bars or cropped content.

Media Extraction

The inspector also lets you extract all supported media from the PPTX as a ZIP file. This copies the media files exactly as stored in the PPTX package. Note: this extracts raw media assets, not rendered slides. It may include theme backgrounds, slide master images, and other assets that are not visible as slide content.

Privacy

The inspector reads your PPTX file locally using JSZip in your browser. The file, the names of files inside it, and the generated report are never sent to SaveSlide and are not stored in analytics. Everything stays on your device.

Technical Limits

  • Maximum file size: 100 MB
  • Only .pptx format. Legacy .ppt files are binary and not ZIP-based, so they cannot be inspected this way.