Workflow
Turn a subtitle file into a clean transcript
Short answer
Turn a caption file into usable text, and check the captions themselves for the timing problems that make them hard to read.
The decision that matters: Whether the captions are worth reusing as-is. If reading speed is above roughly 20 characters per second, the text was written for a machine, not a reader.
Step by step
Check the caption file first
Reading speed, overlaps and over-long lines tell you whether the source captions are usable.
Fix the timing if it drifts
A constant offset is fixable in one pass; progressive drift is a frame-rate mismatch and is not.
Convert to the format you need
Browser players need VTT; most editors and upload forms want SRT.
Limits to know
- These tools read the caption file only. They cannot generate captions from audio.
- Formatting tags are stripped from the statistics but preserved in conversions.
Run the whole workflow in one place
Koldflux takes one source through checking, reframing, captions and export, and gives you a pack per platform.
Reviewed October 5, 2026 by the Koldflux team against the platform limits used by the linked tools.