Free online TXT to MKV converter

A device or editing workflow that accepts video but not plain documents may require a TXT file to be rendered as a clip. MKV can contain that video, but converting plain characters does not create meaningful motion or timing unless you choose how long each page or frame appears.

What the TXT format is

TXT is a plain-text format that stores characters and line breaks without fonts, page layout, images, or playback timing. Text editors such as Notepad, TextEdit, and Visual Studio Code create TXT files; they are also common for notes, logs, and exported data.

What the MKV format is

MKV, or Matroska, is a multimedia container that can package video, audio, subtitles, and metadata in one file. It is useful for storing or sharing video with multiple tracks, but a player must support both the MKV container and the codecs used inside it.

Convert a TXT file to MKV

Online on 101convert.com

1. Upload the TXT file to the converter on this page. You can add several files for batch conversion; the per-file size limit is shown on the page.
2. Set show each page for to choose how long each page is displayed.
3. Convert the file, then download the resulting MKV.

Offline with desktop software

With FFmpeg, you can render a TXT file as white characters on a black video frame. FFmpeg runs on Windows, macOS, and Linux; use a build with the drawtext filter enabled. This example produces a 10-second, silent 1280 × 720 clip:

ffmpeg -f lavfi -i "color=c=black:s=1280x720:r=25:d=10" -vf "drawtext=fontfile=/path/to/font.ttf:textfile=input.txt:fontcolor=white:fontsize=32:x=40:y=40:line_spacing=8" -c:v libx264 -pix_fmt yuv420p output.mkv

Replace input.txt and the font path with actual paths, and change d=10 to the required duration in seconds. Add line breaks or shorten the content if it does not fit the frame; this command displays the whole file on one static frame rather than dividing it into timed pages.

Quality and limitations

A TXT file contains no page duration, so the output timing must be set during conversion. The FFmpeg example makes a video stream without audio; the characters are rendered into pixels and are no longer selectable as text. Long documents may need pagination or formatting before conversion, and the result’s compatibility depends on the video codec as well as the MKV container.