Free online PPTX to PNG converter

A website, document editor, or image-only device may accept PNG files but not editable PowerPoint presentations. Converting a PPTX creates a separate image for each slide, making the deck easier to share, preview, archive, or insert into other documents.

What the PPTX format is

PPTX is Microsoft PowerPoint’s XML-based presentation format, introduced with PowerPoint 2007. It is a ZIP-based package containing slides, text, themes, layouts, charts, images, animations, speaker notes, and other presentation data.

Microsoft PowerPoint, LibreOffice Impress, Apple Keynote, and other presentation applications can open or create PPTX files. The format preserves editable presentation objects; PNG does not.

What the PNG format is

PNG is a raster image format with lossless compression and support for transparency. It preserves sharp text, diagrams, logos, and flat-color graphics more reliably than JPEG, although PNG files are often larger when the slide contains photographs.

A PNG export flattens each slide into one image. It does not retain editable text, separate objects, animations, transitions, speaker notes, audio, video, hyperlinks, or presentation timing. PNG transparency is supported by the format, but a normal slide export usually includes the slide’s background rather than making it transparent.

How to convert PPTX to PNG

Microsoft PowerPoint

1. Open the .pptx file in PowerPoint and check the slides for missing fonts, layout changes, and unsupported effects.
2. Choose File → Save As or File → Export, select PNG as the output format, and save the file.
3. When PowerPoint asks which slides to export, choose Every Slide for the complete presentation or Just This One for only the current slide.
4. PowerPoint creates a folder containing numbered PNG files, normally one file per slide.

The exact menu names vary by PowerPoint version. If the presentation contains a single slide, PowerPoint may save the image directly instead of creating a slide-image folder.

LibreOffice Impress

1. Open the PPTX in LibreOffice Impress and review any formatting changes caused by compatibility differences.
2. Select the slide to export, then choose File → Export.
3. Set the file type to PNG - Portable Network Graphics (.png), choose a filename, and save.
4. Repeat the export for each slide that needs an image. For a complete deck, exporting to PDF first and rasterizing the PDF with an image application can be more efficient, but it adds an extra conversion step.

Convert without installing software

You can convert the file for free on 101convert.com by uploading the PPTX, selecting PNG, starting the conversion, and downloading the generated slide images. Do not upload confidential presentations unless the service’s storage, processing, and deletion terms are acceptable.

Quality and compatibility limits

PNG output has a fixed pixel size. A slide exported at 1280 × 720 will look soft when enlarged, and increasing image dimensions later cannot restore missing detail. For screen sharing or web use, 1920 × 1080 is a suitable target for a 16:9 slide when the conversion tool provides a resolution setting; print work may require larger dimensions or a vector/PDF output instead.

The presentation’s aspect ratio determines the image proportions. A 16:9 deck exported as 4:3, or vice versa, can acquire cropping, distortion, or empty margins. Set the slide size before exporting rather than correcting the PNG afterward.

Fonts installed on the computer or conversion system affect line breaks, text wrapping, and object positions. Missing fonts may be substituted. PowerPoint effects, SmartArt, charts, transparency, shadows, and other features can render differently in non-Microsoft applications, so inspect the PNG files at 100% zoom, especially when slides contain small text or layered graphics.

Renaming a PPTX file to .zip can expose embedded source images in its ppt/media folder, but copying those files is not a slide conversion: it does not reproduce the complete slide layout, text, or effects.