How to open a subtitle file online
Three steps, a few seconds, no software.
Open your .VTT file
Drop it on the box, choose it from your device, or paste its text straight in.
View every line
See the start, end, duration and reading speed of each line, with any problems flagged.
Preview, fix, convert
Play the lines over your video, shift the timing, then download in the format you need.
What is a .VTT file?
Timed text that appears on top of a video.
A VTT file is a WebVTT subtitle file, plain text with timecodes that displays captions on HTML5 video. You don't open it alone: place it next to your video and load it in VLC, or attach it to an HTML5 video element with a track tag. To read or edit the text, open it in any text editor or Subtitle Edit.
Programs that open .VTT files
| Full name | WebVTT — Web Video Text Tracks (Subtitle/Caption File) |
|---|---|
| Developer | W3C / WHATWG (WebVTT standard) |
| First released | WebVTT proposed ~2010 (from SRT); W3C standard for the HTML5 <track> element |
| Category | Text & Code |
| MIME type | text/vtt |
Related viewers
Every viewer is free to use.
Frequently asked questions
Is my .VTT file uploaded?
No. The file is read by your browser. If you preview with a video, the video is also played locally.
My .VTT file is out of sync. Can I fix it?
Yes. If they're early or late by a fixed amount, enter the difference in milliseconds and click Shift. If they drift more and more over time, the frame rate is wrong: use Change FPS (for example 25 → 23.976).
Why are some characters broken (é, ł)?
Older subtitles are often saved in a regional encoding like Windows-1250. We detect it automatically and every download is saved as UTF-8, which works everywhere.
What do the warnings mean?
Overlap: two lines on screen at once. Too fast: more than 20 characters per second. Too short: under 0.83 s. Long line: over 42 characters. 3+ lines: too much text at once.
Can I convert ASS to SRT?
Yes. Italic, bold and underline are kept; positioning and karaoke effects are dropped because SRT can't store them.
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