VTT to TTML
Turn WebVTT subtitles files into TTML subtitles files on your own Mac, Windows or Linux computer. Asteria is free, works offline, and never uploads your files.
How to do it
- Download Asteria and open it. It's free and needs no account.
- Drop your VTT files onto its window, or press ⌘O (Ctrl O on Windows) to choose them. Drop as many as you like.
- Type convert to ttmland press Enter. Save subtitles as TTML/DFXP timed text.
- Press ⌘↵ (Ctrl ↵ on Windows) to save. The TTML files appear next to the originals, which stay exactly as they were.
What it needs
Nothing. This conversion is built into Asteria, so it works the moment the app is open, even offline.
How it was tested
A real VTT file was converted on macOS on Apple silicon and Linux, and the TTML that came out was opened and checked with Python parser to make sure it is what it says it is.
Download Asteria
Free for Mac, Windows and Linux. Other systems and first-launch help