Are my subtitle files uploaded?

No. The file is read and converted in your browser. Its contents are not uploaded or stored by Rooster.

What is the difference between SRT and WebVTT?

Both store timed caption cues as text. SRT uses commas in timestamps and numbered cues. WebVTT uses full stops, starts with a WEBVTT header and can carry browser-specific cue settings.

Does conversion change the caption wording or timing?

No. The converter rewrites the subtitle format while keeping each readable cue's text and timing. It reports malformed or overlapping cues for you to review.

Free tools

SRT to VTT subtitle converter

Convert SRT captions to WebVTT, or WebVTT captions to SRT. Choose a file or paste the text, check the cues and download the new format.

This tool runs entirely in your browser - nothing is uploaded, nothing is stored, and nothing you type leaves the page.

Choose a subtitle file

Choose an SRT or VTT file, or paste its contents below.

Or paste subtitle text

Convert to

Nothing to convert yet

Converted captions

What the converter changes

SRT and WebVTT describe the same basic thing: when a caption appears, when it disappears and what it says. The converter reads those cues and rewrites their timestamps and structure for the other format. It keeps the wording and timing, and flags malformed or overlapping cues rather than silently inventing a repair.

This is a subtitle-file utility, not a video editor. It does not transcribe, translate, retime or burn captions into a video. Rooster’s planned caption workflow is described on the captions page. You can try Rooster free.

Questions about subtitle conversion

Are my subtitle files uploaded?: No. The file is read and converted in your browser. Its contents are not uploaded or stored by Rooster.
What is the difference between SRT and WebVTT?: Both store timed caption cues as text. SRT uses commas in timestamps and numbered cues. WebVTT uses full stops, starts with a WEBVTT header and can carry browser-specific cue settings.
Does conversion change the caption wording or timing?: No. The converter rewrites the subtitle format while keeping each readable cue's text and timing. It reports malformed or overlapping cues for you to review.