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Free Subtitle Extractor — MKV & MP4 to SRT

Extract the subtitle tracks inside an MKV, MP4, MOV, WebM or TS video as SRT, ASS or VTT files. Every language in one go, named so players find them. Runs in your browser; the video is not uploaded.

Drop a file here, or click to browse

MKV, MP4, M4V, MOV, WEBM, TS, M2TS, MTS, AVI, MKS · processed on your device

or press Ctrl+V to paste from your clipboard

Browse files

Your files never leave your device. All processing happens locally in your browser.

How It Works

A video file such as MKV or MP4 can carry several subtitle tracks next to the picture and the sound. The page asks ffmpeg (compiled to WebAssembly, in your browser) to list them, then writes each track you pick to its own file in a single read of the video. Text subtitles keep their wording and timing exactly; picture subtitles from Blu-rays and DVDs are copied as they are.

  1. 1
    Open the video
    Drop an MKV, MP4, MOV, WebM or TS file, or press "Browse files". Large films work: the file is read where it is, not copied into memory.
  2. 2
    Pick the tracks
    Every subtitle track is listed with its language, title and flags such as Forced or SDH. All are ticked; untick the ones you don't want.
  3. 3
    Choose the format
    Original keeps each track's own format (SRT stays SRT, ASS keeps its styles). Or turn them all into .srt, .vtt or .ass.
  4. 4
    Extract and save
    Press "Extract". Each file is named like Movie.eng.srt, so players load it next to the video. Save one, or all of them as a ZIP.

Your video is read in this browser and never uploaded.

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Frequently Asked Questions