Subtitle Converter (SRT to VTT and VTT to SRT)

How to convert SRT to VTT

1. Paste your subtitles into the input box, or open an .srt file. The direction switches automatically when you open a file.
2. If the captions are early or late, enter an offset. Use a negative number to make captions appear sooner.
3. Press Convert, then download the file or copy the text.

Why WebVTT matters for streaming

Browsers and HLS players expect WebVTT for text tracks. An SRT file uploaded to a web player or referenced in an HLS playlist will usually be ignored. Converting is mostly a matter of adding the WEBVTT header and changing the comma before milliseconds to a full stop, but doing it by hand across a long file invites mistakes. Once you have a .vtt file, our guide to adding subtitles to HLS shows how to list it in your master playlist so viewers can switch captions on.

Fixing out-of-sync captions

If every caption is off by the same amount, a constant shift fixes it. This happens when a video is re-edited with a new intro, or when captions were made from a version with a different start point. If the drift grows over time, the frame rate of the captioned version differed from the final video, and the file needs re-timing in a caption editor rather than a simple shift.

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