Compress PowerPoint images, see what takes up space, and keep the originals that matter. Your presentation stays on your device.
One .pptx file · processed on your device
PPT Tools is a browser-based PPTX compressor. It reduces suitable raster images and removes confirmed unused images while preserving editable slides, vectors, embedded fonts, audio and video.
Choose a .pptx file or try the sample presentation.
Review the size diagnosis. Compare images and keep important originals.
Choose High Quality, Strict Lossless, or a target size, then compress.
Download the result and check it in PowerPoint before sharing.
File composition matters more than its total size. Photo-heavy decks may shrink substantially; decks dominated by video or already optimized images may barely change. Large-file success depends on your browser and available memory. A 500 MB file is a testing scenario, not a universal capacity promise. Try a desktop browser, close other tabs, and keep your original.
| Mode | What changes | Best for |
|---|---|---|
| High Quality | Suitable images resized to a 1920 px long edge and re-encoded; transparent PNG stays PNG. | Everyday sharing |
| Strict Lossless | Retained resources keep their original bytes; safe unused-image cleanup and ZIP repacking only. | Sensitive detail |
| Target Size | Best-effort image compression toward 20, 50 or 100 MB. A target is not guaranteed. | Attachment limits |
| Tool | Processing | Limits and access |
|---|---|---|
| PPT Tools | On your device; no presentation upload | No account or download payment; device memory determines capacity |
| WeCompress | Check the provider’s current privacy information | Check current file limits before uploading |
| Smallpdf | Check the provider’s current privacy information | Check current supported formats, free limits and account requirements |
| iLovePDF | Check the provider’s current privacy information | Check current supported formats and conversion requirements |
Provider limits and features change. Verify them on each official site; no third-party capacity or transparency claim is assumed here. WeCompress · Smallpdf · iLovePDF
High-resolution photos, repeated media, embedded fonts and videos can make a deck large. The size diagnosis shows which resources contribute most.
High Quality and Target Size can change raster image detail. Compare images before compressing, or keep an image original. Strict Lossless does not re-encode retained images.
Slide XML, text and chart parts are preserved. This tool does not flatten your presentation into images. Always review the downloaded deck in your presentation software.
Transparent images are never converted to JPEG. SVG and other vector resources are retained unchanged.
No. Audio, video and embedded fonts are retained. If they dominate the file, image compression may have little effect.
This version accepts .pptx only. Open an old .ppt in PowerPoint and save it as .pptx. Remove password encryption before choosing the file.
Use a current desktop browser with image decoding and OffscreenCanvas support. Available memory and browser capabilities affect large files.
Presentation processing runs in your browser. No presentation upload, account or payment is needed. Keep your original file and check the result before sharing.