CaptionKit Tools
YouTube Subtitle Formatter
Prepare readable SRT or VTT captions with concise lines and a quick speed warning summary.
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Result
Example
Input
1 00:00:01,000 --> 00:00:04,000 A long caption that needs a clearer line break for viewers.
Output
1 00:00:01,000 --> 00:00:04,000 A long caption that needs a clearer line break for viewers.
How to use
- 1Upload a supported file or paste your content.
- 2Choose any options, then start processing.
- 3Review, copy or download the result.
Common errors
Make sure the file is UTF-8 text and every cue has a valid timestamp. Empty or unsupported files cannot be processed.
Frequently asked questions
Are my files uploaded?
No. Local tools process files in your browser and do not send them anywhere.
Does formatting stay intact?
Cue timing and caption text are preserved. Unsupported metadata may be removed during format conversion.