Subtitle Converter
VideoConvert subtitles between SRT and VTT, shift timings and fix numbering — no upload.
Subtitle Converter moves captions between SRT and VTT — the two formats that between them cover video players, editors and the web — and shifts their timing when the words have drifted out of sync with the picture. Nudge every cue by a set number of seconds, convert, and download. It's plain text parsing done in your browser, so an unreleased episode's captions never get uploaded anywhere.
Why use Subtitle Converter
100% private
Your video files are processed locally and never uploaded.
Instant
No upload or download wait — it runs at the speed of your device.
Free to start
Use it free every day; go Pro for unlimited runs.
No install
Works in any modern browser. No sign-up to begin.
How to use Subtitle Converter
- 1Paste or open your captions
Drop in an .srt or .vtt file, or paste the cues straight in — the format is detected for you.
- 2Convert and fix the timing
Switch between SRT and VTT, and shift every cue by a number of seconds when the words have drifted out of sync.
- 3Download the result
Save the converted file with cues renumbered from 1, or copy the text out directly.
Frequently asked questions
What's the difference between SRT and VTT?
SRT is the older, widely supported format using comma milliseconds and numbered cues. VTT (WebVTT) is the web standard used by HTML5 video and platforms like YouTube, with dot milliseconds and optional styling. Converting between them is mostly a formatting change — this tool handles it instantly.
How does the timing shift work?
Enter an offset in seconds (negative to make subtitles appear earlier, positive for later) and every cue's start and end time moves by that amount. Use it when subtitles drift out of sync with the video.
Can it fix broken subtitle numbering?
Yes — when exporting to SRT, cues are renumbered sequentially from 1 automatically, so gaps or duplicate numbers from editing are repaired for free.
Are my subtitle files uploaded anywhere?
No. Parsing, converting and shifting all happen in your browser. Your transcript never leaves your device — relevant if your subtitles contain unreleased or confidential content.