Guide1 min readUpdated June 29, 2026

How to clean up captions and subtitles

Short answer

To clean captions, strip the timestamps and sequence numbers, join broken lines back into sentences, and remove filler and duplicate lines. The result is plain, readable text you can reuse as a transcript or summary.

Why raw captions are messy

Caption files like SRT and VTT are built for playback, not reading. They wrap text into short timed cues, each with a number and a timestamp, and auto-generated ones repeat words and lack punctuation.

1
00:00:01,000 --> 00:00:03,500
so today we're going to
look at how this works

An SRT cue

What to remove and fix

Sequence numbers and timestamp lines
Line breaks that split sentences mid-thought
Duplicate lines from overlapping cues
Filler words and stray formatting tags

Try it: Caption CleanerStrip timestamps and tidy caption text into readable paragraphs locally.Open tool

Great for descriptionsA cleaned transcript is a strong base for a video description or show notes. Pair it with a structured description for the best result.

References

Questions

What is the difference between SRT and VTT captions?

Both are timed caption formats. SRT is the simplest and most widely supported; VTT (WebVTT) is used on the web and adds styling and positioning features. Both contain timestamps you can strip for plain text.

Will cleaning captions fix punctuation?

Cleaning removes timestamps and rejoins lines, but auto-generated captions often lack punctuation entirely. You may still need to add sentence breaks by hand.

Does the caption cleaner upload my file?

No. Captions are cleaned locally in your browser and are never uploaded.