How it works
Complete the job in three clear steps
- Choose or paste an SRT file or pasted SRT text.
- Review the timing and create a WebVTT file.
- Preview or download the result before closing the page.
Private Lucaden subtitle tool
SRT to VTT Converter
Convert SubRip SRT captions into a standards-based WebVTT track with normalized timestamps.
Free to use Your subtitle text and files stay in this browser and are not uploaded to Lucaden.
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Important
Check the result before relying on it
Keep an untouched copy of important source files. Browser processing depends on available device memory, and you should inspect every downloaded result before deleting the original.
Practical details
What this Lucaden tool does
Convert SubRip SRT captions into a standards-based WebVTT track with normalized timestamps.
The parser normalizes SubRip and WebVTT cues into millisecond timestamps. Lucaden then serializes a new file instead of modifying the original.
Included capabilities
- SubRip parsing
- WEBVTT header generation
- Multiline cue preservation
- Millisecond timestamp normalization
Useful for
- Add captions to an HTML video
- Prepare a browser track
- Normalize generated subtitles
- Move captions into a web workflow
Questions
About this tool
Are advanced SRT styles preserved?
Basic inline text is retained, but player-specific positioning or styling may not translate between formats.
Does conversion change cue timing?
No. Valid start and end times remain the same, expressed with WebVTT's period separator.
Open-source foundations
Built transparently
Lucaden documents its standards sources, architectural references, and permissive runtime dependencies while keeping this workspace consistent with the Lucaden interface.