Free online PPT to MKV converter

Some playback systems and archiving workflows require Matroska (MKV) video rather than a PowerPoint deck. Converting the slides to a timed video lets viewers play them without presentation software, but the result is no longer an editable slide deck.

What the PPT format is

.ppt is the legacy Microsoft PowerPoint presentation format, used for slide decks containing text, images, charts, and other presentation content. It is commonly created or opened in Microsoft PowerPoint and LibreOffice Impress.

What the MKV format is

MKV, or Matroska, is a multimedia container that can hold video, audio, subtitles, and other tracks. It is useful for storing a complete video in one file, but playback depends on the device or player supporting both MKV and the codecs inside it. MKV is a container, not a video codec.

How to convert PPT to MKV

Online on 101convert.com

1. Upload the PPT file on the converter page; you can add several files for batch conversion. A per-file size limit is shown on the page.
2. Set show each page for to choose how long each slide is displayed.
3. Start the conversion, then download the MKV file when it is ready.

Offline with desktop software

Free workflow with LibreOffice, Poppler, and FFmpeg: LibreOffice is available for Windows, macOS, and Linux. Open the deck in Impress and use File → Export As → Export as PDF, saving it as slides.pdf. Render the PDF pages to PNG images with Poppler’s pdftoppm:

pdftoppm -png -r 150 slides.pdf slide

With FFmpeg installed, create an MKV at five seconds per slide:

ffmpeg -framerate 1/5 -i slide-%02d.png -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -c:v libx264 -pix_fmt yuv420p presentation.mkv

This PDF-based method makes a static video: it does not preserve PowerPoint animations, transitions, narration, or embedded video.

Microsoft PowerPoint on Windows: Open the deck and use File → Export → Create a Video to export it as presentation.mp4. Then use FFmpeg to place the MP4’s streams in an MKV container without re-encoding:

ffmpeg -i presentation.mp4 -c copy presentation.mkv

Quality and compatibility

The remuxing command copies the video and audio streams, so it does not reduce quality; it also does not make unsupported codecs playable on a device. The LibreOffice workflow encodes the rendered slides as H.264 video and has no audio unless an audio track is added separately.