Extract subtitles from MKV — save the text tracks as SRT
Pull the subtitle tracks out of an .mkv or .webm video and save them as .srt or .ass — read straight from the disk, without loading the film.
About this conversion
An .mkv film often carries several subtitle tracks inside — a full one and a “forced” one for signs, in two or three languages. Here the video is not loaded into the page: only its list of tracks and the subtitle lines themselves are read from the disk, so a 10 GB film opens in seconds, guided by the index many MKV files keep. A file without that index is read through once instead, which takes longer on a big film; progress is shown. Each text track — SRT, ASS or WebVTT inside — appears by its language and name, ready to save, fix or merge with another track. The saved file is named the way players expect, Film.en.srt next to Film.mkv, so the player picks it up by itself.
Just want to look inside it?
The same tool without converting anything: open the file and read it.
Fix it before you save it
The file stays open after it is read, so the format is picked at the end: the same subtitles can leave here as VTT, ASS, SBV, SUB (MicroDVD), TTML / DFXP, SAMI (.smi), LRC, TXT, Word, Excel or PDF. Before that you can move every line earlier or later, stretch the timing to a different release of the film, remove [DOOR SLAMS] and speaker names, put a second language under the first, and see which lines break the rules studios follow — too long, too fast, overlapping.
Questions
- It says some tracks are stored as pictures.
- Blu-ray (PGS) and DVD (VobSub) subtitles are images of text, not text. Turning them into text needs character recognition, which is not ready here yet; the text tracks of the same film open as usual.
- How do I get every track?
- Each one is listed in the file list above the table. Pick a track and save it, then the next. Tracks marked forced only translate signs and short foreign lines.
- Will it keep the styles of an anime ASS track?
- Yes — an ASS track is saved as ASS with its styles. Fonts embedded in the MKV stay in the video.
- Does it work with MP4 or AVI?
- Not yet — MKV and WebM only. For those, look for the subtitles as a separate file.