Free transcript subtitle tool
TXT to SRT Converter
Turn transcript text into numbered SubRip captions in your browser. Set words per caption, start time, and either a target video duration or fixed cue length, then copy or download the .srt file.
Paste TXT transcript text
SRT preview
Numbered cues with estimated timestamps
1 00:00:00,000 --> 00:00:04,983 Host: Welcome to the Sotto subtitle workflow. 2 00:00:04,983 --> 00:00:11,390 Paste a finished transcript, choose how many words should 3 00:00:11,390 --> 00:00:17,797 appear in each caption, then set either the target 4 00:00:17,797 --> 00:00:22,780 video duration or a fixed cue length. 5 00:00:22,780 --> 00:00:29,186 This converter creates browser-side SRT timing from your settings. 6 00:00:29,186 --> 00:00:35,593 It does not transcribe audio or align speech automatically, 7 00:00:35,593 --> 00:00:42,000 so review the result against your video before publishing.
Validation notes
0 timestamp lines removed, 0 errors, 0 warnings.
SRT preview is ready. Timing is estimated from your text settings.
Text-first captions
Paste a finished transcript and create SRT blocks from words, sentence endings, and your timing settings.
Two timing modes
Fit captions across a target duration or assign a fixed duration to every cue for rough subtitle drafts.
Private browser output
The page builds SRT text locally and avoids pretending it has real audio alignment.
Need the transcript before making captions?
Sotto turns speech into private local text on your Mac. Bring that transcript here when you need a quick SRT draft.