SRT Line Breaker
Subtitles with long lines are hard to read and get cut off on phones. Set a maximum line length and number of lines, and every subtitle is re-wrapped; the ones that don't fit are split into more subtitles with the time shared out.
Runs in your browser. Your subtitles are never uploaded.
Re-wrap in three steps
Add the SRT
Paste it or open the file.
Set the limits
42 characters and 2 lines is the standard; use words per line for short-form captions.
Break lines and download
Lines break between words, never inside one.
What line length to use
42 characters per line, two lines per subtitle, is the limit Netflix and most streaming services use for Latin-alphabet languages. Broadcast TV captions (CEA-608) allow 32 characters per line, so use 32 for TV deliveries.
Vertical short-form video is narrower and watched on phones: one line of three to five words at a time reads best. Set max lines to 1 and max words per line to 3, 4 or 5.
When a subtitle has more text than fits, it becomes two or more subtitles. Its time is shared between them by length, so the new subtitles still follow the speech.
Small details that matter
Tags don't count
<i> and <b> tags aren't counted toward the line length.
Timing follows the text
Split subtitles share the original time by number of characters.
Words or characters
Limit by characters, or by words for punchy short-form captions.
Frequently
Asked Questions
What's the maximum characters per line for subtitles?
42 for Netflix and most streaming platforms, 32 for broadcast TV (CEA-608), and shorter for vertical video, where one line of a few words works best.
Will it break a word in half?
No. Lines only break at spaces. A single word longer than the limit stays on its own line.
Does it change the timing?
Only for subtitles that are split: their time is divided between the new parts. The rest keep their times.
Is my file uploaded?
No. It's processed in your browser.