Free online PPSX to WEBP converter

Web pages and image-based sharing workflows may require presentation slides as WebP files rather than as a PowerPoint slideshow. Converting the slides creates separate images that can be embedded in a site or viewed without presentation software.

What the PPSX format is

PPSX is the PowerPoint Open XML Show format, used for presentations that open directly as a slide show. Microsoft PowerPoint and other presentation programs, including LibreOffice Impress, can create or open PPSX files. A PPSX may contain multiple slides, images, text, charts, and other presentation content.

What the WEBP format is

WebP is a raster image format used widely for web graphics. It supports lossy and lossless compression and transparency; lossy WebP can reduce file size compared with a PNG while retaining acceptable visual quality. A converted slide is a static image, not an editable presentation slide.

How to convert PPSX to WEBP

Online on 101convert.com

1. Upload the PPSX file on the converter page. Multiple files can be added for batch conversion; the page shows the per-file size limit.
2. Before converting, set any needed options: pages, resolution, quality, image size, max width, max height, auto orient, or strip metadata.
3. Start the conversion, then download the resulting WebP files. The conversion runs on the service’s server with LibreOffice, then ImageMagick.

Offline with desktop software

LibreOffice Impress and ImageMagick 7 are free and run on Windows, macOS, and Linux. Export the presentation to PDF, then rasterize its pages as WebP images. In a terminal, from the folder containing the PPSX file, run:

mkdir pdf
libreoffice --headless --convert-to pdf --outdir pdf presentation.ppsx
magick -density 150 pdf/presentation.pdf -quality 82 slide-%03d.webp

Replace presentation.ppsx with the input filename. The resolution setting (150 DPI) affects rendered detail, and -quality 82 sets lossy WebP quality; adjust these values for the desired balance of sharpness and file size. ImageMagick must be permitted to read PDF files by its installed security policy.

Microsoft PowerPoint is a commercial option on Windows and macOS. Open the PPSX, export all slides as PNG images using File → Export (the exact menu labels vary by version), then run ImageMagick 7 in the folder containing those PNG files:

magick mogrify -format webp -quality 82 *.png

This creates a WebP file for each PNG. Keep the exported PNGs in a separate folder if you want to preserve them alongside the converted images.

Quality and limitations

Each selected slide becomes a separate image; slide order is reflected in the output filenames. Animations, transitions, notes, and interactive presentation features are not preserved. Increase rendering resolution for small text or detailed charts, and reduce WebP quality only if smaller files matter more than fine visual detail.