WorkbenchA useful little toolbox.

Extract MKV subtitles to SRT

Extract an embedded UTF-8 subtitle track without uploading the video.

Processed on your device. No file upload.
Choose a file to get started

Drop it here, or use the file picker.

How to use this tool

  1. Choose your file or try the example.
  2. Run the tool and check the result.
  3. Save the result where a download is available.

Supported features & limits

Reads S_TEXT/UTF8 subtitle tracks and preserves block timing. Track number 0 chooses the first supported text track. Lists available subtitle tracks. Seeks through the file in a Worker using a 4 MB cache; up to 4 GB input and 120 seconds. Bitmap/PGS, ASS, encrypted/compressed tracks, lacing and missing durations are unsupported. No speech transcription or OCR.

Reference

What happens to my files?

Your browser reads the file locally. File contents are not sent to our server. Closing or resetting this page clears the working result. Downloaded copies remain on your device.

Maintained by Roman Zmazhenko. Updated 1 November 2026.