WebFaz Subtitles

Extract subtitles from a video (MP4, MKV, WebM)

PT

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Extract subtitles from a video (MP4, MKV, WebM)

Select a video that has embedded subtitles and choose the track: the app reads only the subtitle data, without decoding the video, and delivers the text with the times. It works with MP4, MOV, MKV and WebM, and also with a ZIP that contains videos. The reading happens in the browser, without sending the video.

Open or drag a subtitle, ZIP or videoSubtitles up to 5 MB · ZIP up to 256 MB · MP4/MOV and MKV/WebM up to 2 GB

Files stay on your device.

Input

JSON: array of objects with start and end in seconds and text with the line. TXT and Markdown: each non-empty line becomes a block.

Output

Watch and fix the subtitles

Video and editing stay on the device. Review text and times and apply the corrections before sending.

Subtitle lines

0 of 0 lines

Open a subtitle or use Add line to create from scratch.

Reading review · 0 line(s) with warnings

Warnings help review long lines, fast reading, more than two lines, durations and overlaps. They are adjustable references, do not block export and may be intentional in dialogue.

The output uses the applied corrections.

Continue in the video editor or the text editor.

How to do it, step by step

  1. Select the video (or a ZIP that contains it).
  2. Choose the subtitle track in the list (for MKV, the name and language appear).
  3. Click Extract selected track.
  4. Choose the output format and download.

See where to click, with an image of the tool →

When this is useful

Take the subtitles from an MKV to use in another player

Many MKVs carry several language tracks.

Reuse a video’s subtitles as text

Extract and convert to TXT or Markdown.

Tips for a good result

  • Videos of up to 2 GB; the reading does not load the whole video into memory.
  • The downloaded file takes the video’s name, the language and the track number, for example movie-by-track-2.srt.
  • After extracting, the Input box shows the subtitles as JSON (start and end in seconds and text): it is just the internal form; the Output carries the chosen format.
  • If the video has no subtitles, to create some use WebFaz Transcription.

What this tool does not do

  • MKV: UTF-8, ASS/SSA and WebVTT tracks. MP4 and MOV: tx3g and WebVTT tracks.
  • Fragmented MP4 is not supported.
  • Subtitles burned into the video picture and image-based tracks require OCR and cannot be extracted.
  • If the video has no subtitle track, the app warns you.
  • The app does not download subtitles from links or transcribe the audio.

Frequently asked questions

Is the video sent anywhere?
No. The app reads the file in your browser.
And if the video has several subtitle tracks?
A list with all the tracks appears and you choose which to extract. In MKV, the list shows name and language.
Can I open a ZIP?
Yes. The app lists the subtitle files and videos inside the ZIP for you to choose.

More Subtitles tools

Text written by Marcelo Amantino · updated October 18, 2026 · who we are