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Glossary Data & Encoding

Subtitle files (SRT and VTT)

SRT and WebVTT are plain-text subtitle formats that pair lines of dialogue with start and end times.

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In more detail

The formats are nearly the same, but SRT writes times with a comma (00:00:01,000 --> 00:00:03,500) while VTT uses a dot, and VTT files must begin with the line WEBVTT. Browsers play VTT in the HTML video element.

Try these tools

SRT to VTT Converter

Easily convert your SRT (.srt) subtitle files to WebVTT (.vtt) format with our free online tool.

VTT to SRT Converter

Convert VTT to SRT instantly with our free VTT to SRT converter.

See also

  • Glossary Codec
    A codec (coder-decoder) is the method used to compress and decompress audio or video, such as H.264, H.265, AV1, AAC or MP3.
  • Glossary Container format
    A container format, such as MP4, MKV or WAV, wraps one or more encoded streams (video, audio, subtitles) and their metadata into one file.
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