SubtitleRocketIs my subtitle file uploaded to a server?
No. The conversion runs in your browser with plain JavaScript. Nothing is sent anywhere, which also means it works offline once the page is open.
Free subtitle tool · runs in your browser
Convert SRT to VTT in your browser
HTML5 video players and most web platforms want WebVTT, but transcription tools usually hand you SRT. This converter rewrites the timestamps (comma to dot), adds the WEBVTT header, and keeps your line breaks, entirely on your device.
SRT in
VTT out
FAQ
What actually changes between SRT and VTT?
VTT starts with a WEBVTT header, uses a dot instead of a comma in timestamps (00:00:01.000), and drops the numeric cue indexes. Text content and timing stay identical.
My VTT needs styling or positioning cues; are they added?
No. The converter produces clean, maximally-compatible VTT without cue settings. Add positioning in your player or editor afterwards if you need it.
Need the captions on the video itself?
These utilities handle subtitle files. To generate captions from speech, style them, and burn them into an MP4, open the full editor; free 720p export, no signup to start.