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utils.sbs

Subtitles tool

Subtitle Line Breaker

Wrap caption lines to a comfortable character width.

Runs on-deviceNo sign-upFree
All subtitles tools

Subtitle Line Breaker workspace

Workspace

Subtitle Line Breaker

Runs locally

Supports SRT and WebVTT. Cue times are parsed to the millisecond and rebuilt without touching your video.

Captions

The guide

By the utils.sbs team · Reviewed November 2026 · How we build and review tools

Quick answer

Subtitle Line Breaker is a free browser-based subtitles tool. Wrap caption lines to a comfortable character width. It runs with JavaScript text parsing locally, requires no account and does not upload your files. Open the page, add your input, adjust any options and download the result.

What is Subtitle Line Breaker?

Subtitle Line Breaker is a free browser-based subtitles tool from utils.sbs. Wrap caption lines to a comfortable character width. It is built for quick, focused jobs: open the page, add your input, adjust the options and take the result with you. No account, install or server upload is required.

At a glance

CategorySubtitles
InputSRT, VTT or plain subtitle text
OutputAn adjusted SRT, VTT or plain-text subtitle file
EngineJavaScript text parsing
ProcessingIn your browser
PriceFree
AccountNot required

How Subtitle Line Breaker works

Subtitle files are parsed as text, adjusted with the selected timing or format options, and written back out as a downloadable file.

How to use Subtitle Line Breaker

  1. 1Open Subtitle Line Breaker and add your input.
  2. 2Adjust the options: max characters per line.
  3. 3Run the tool, check the preview or result, and download the output.

When to use Subtitle Line Breaker

  • Convert subtitle files between SRT, VTT and plain text.
  • Shift or retime captions after editing a video.
  • Clean duplicate cues and line breaks before uploading captions.

Inputs and options

Max characters per line
Enter a numeric value.

Limitations

Overlapping cues or unusual text encodings may require manual cleanup after conversion.

Privacy and accuracy

Subtitle Line Breaker processes its input in the browser whenever the platform API allows it. Files and values are not uploaded to a server for processing, and the tool does not require an account. For calculations, use the result as a reference and verify important decisions against the source formula or a qualified professional. Read our methodology.

FAQ

Subtitle Line Breaker questions

  • What can I do with Subtitle Line Breaker?

    Wrap caption lines to a comfortable character width. Subtitle Line Breaker is part of the Subtitles shelf on utils.sbs and is designed for quick, one-off tasks.

  • Is Subtitle Line Breaker free to use?

    Yes. Subtitle Line Breaker is free, requires no account, and has no per-file or per-use charge.

  • Are my files uploaded when I use Subtitle Line Breaker?

    No. Subtitle Line Breaker is designed to process your input locally in the browser. Files are not uploaded to a server for processing.

  • What formats does Subtitle Line Breaker support?

    It reads common subtitle formats such as SRT and VTT and writes the converted or adjusted file back out.

  • Can I use Subtitle Line Breaker on my phone?

    Yes. Subtitle Line Breaker is responsive and works in modern mobile browsers. Very large files may be limited by the device's available memory.

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