Free online DOC to MKV converter

A video player or workflow that accepts MKV cannot open a Word document as a video. Converting a DOC renders its pages as still frames and displays each for a chosen duration.

What the DOC format is

DOC is the older binary document format used by Microsoft Word, especially Word 97–2003. Microsoft Word and LibreOffice can create or open DOC files; they commonly contain formatted text, images, tables, and page layouts, not video.

What the MKV format is

MKV, or Matroska, is a container for video, audio, subtitles, and related tracks. It can hold video encoded with codecs such as H.264, but MKV itself is not a video codec. A DOC converted to MKV becomes a video of page images; its text is no longer directly editable or searchable as document text.

How to convert DOC to MKV

Online on 101convert.com

1. Open the DOC-to-MKV converter on 101convert.com and upload your DOC file. The converter accepts batch uploads; check the page for the per-file size limit.
2. Set show each page for to choose how long each document page appears.
3. Start the conversion, then download the resulting file.

Offline with desktop software

For a local workflow, use LibreOffice to render the DOC as PDF, Poppler’s pdftoppm to turn the PDF pages into images, and FFmpeg to encode those images as MKV. These tools are available for Linux, macOS, and Windows.

1. In a terminal, convert the document to PDF with LibreOffice: libreoffice --headless --convert-to pdf --outdir work input.doc
2. Render the PDF pages to PNG images at 150 dpi: pdftoppm -png -r 150 work/input.pdf work/page. This creates files such as work/page-1.png.
3. Encode the image sequence as a video, showing each page for five seconds: ffmpeg -framerate 1/5 -i work/page-%d.png -vf "scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2,format=yuv420p" -c:v libx264 -r 25 output.mkv. Change 1/5 to 1/N to show each page for N seconds.

Quality and limitations

Rendering turns page content into pixels, so small text may be difficult to read at low resolution; increase the -r value if sharper page images are needed. This workflow creates a silent video with no page transitions. The PDF rendering step can also change layout if the fonts used by the DOC are unavailable on the computer.