Tools/Transcripts & subtitles

Caption Line-Length Fixer

Rewraps caption lines to a maximum width so they do not overflow the screen. Broadcast convention is 42 characters. No word is ever split or dropped.

Caption page

Drop a caption file on this page

.srt, .vtt or .txt. Click to choose one.

This runs entirely in your browser. The file is never uploaded to a server.

  • Free · no signup
  • Paste or upload a file
  • Runs in your browser
What this does

Rewraps every cue so no line runs past a maximum width. The default is 42 characters, which is the broadcast convention and roughly what fits comfortably on a phone.

Words are never split and never dropped. Only the line breaks move, so the text a viewer reads is exactly the text you started with.

Use cases
  1. 01Stop long caption lines overflowing on a phone screen.
  2. 02Meet a platform or broadcaster spec that names a character limit per line.
  3. 03Tidy an auto-generated file where cues run to one long line.
FAQ

Questions, answered.

Why 42 characters?

It is the long-standing subtitle convention, and two lines of 42 read cleanly at typical caption sizes. You can set any width you like.

Does it change the wording?

No. It only moves line breaks. We check the words coming out match the words going in.

Does it change the timings?

No. Each cue keeps its in and out time exactly.

From the notebook
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