macos

mkvtoolnix is a set of free, open-source tools to edit MKV files.

Useful features:

  • Add subtitles to mkv files using the MKVMerge tool.

    It performs soft subs, which means it embeds subtitles as a separate, selectable track within an MKV file, allowing viewers to turn them on or off.

Limits: only supports MKV video files.

Download

Q: What’s the difference between soft subs and hard subs?
A: Hard subs permanently burns the subtitles into the video itself and cannot be turned off.

Q: How can I merge multiple video, audio, or subtitle files into a single MKV file?
A: Refer to the official document.

Windows

mkvtoolnix-batch-tool can embed subtitle files into videos in a batch. [Only for Windows OS]

The following file types are supported.

Video:

  • AVI, M4V, MKV, MOV, MP4, MPG, MPEG, OGG, OGM, WEBM, WMV

Subtitle:

  • ASS, IDX, PGS, SMI, SRT, SSA, SUB, SUP, VTT