Subtitle Line Length Checker
Find subtitle lines longer than 42 characters and report their cue line numbers.
How to use the Subtitle Line Length Checker
What does the Subtitle Line Length Checker do?
Find subtitle lines longer than 42 characters and report their cue line numbers; It applies this page-specific rule: this page counts Unicode characters on each subtitle text line and reports only lines above your chosen limit.
Which inputs does this tool use?
To find subtitle lines longer than 42 characters and report their cue line numbers, enter Subtitle content, Input format, Maximum characters per line, Lines over the limit; keep every value in the same example; where available, choose between Detect SRT or WebVTT, SRT, WebVTT to match the required format; select Check subtitle line lengths when the values are ready; Start with a familiar case covered by this rule - Markup such as can be excluded because viewers do not see the tag characters - so the expected result can confirm the settings.
How should the tool result be read?
For a result intended to find subtitle lines longer than 42 characters and report their cue line numbers, markup such as can be excluded because viewers do not see the tag characters; read lines over the limit together with the original subtitle content rather than as an isolated answer, and confirm that its units or structure match the intended use.
Does the tool force a 42-character rule?
When the goal is to find subtitle lines longer than 42 characters and report their cue line numbers, no.
Are HTML-style tags counted?
When using the page to find subtitle lines longer than 42 characters and report their cue line numbers, they are excluded by default, while their visible text remains counted.
Limits and accuracy
When using this tool to find subtitle lines longer than 42 characters and report their cue line numbers, a character threshold is a production choice, not a universal guarantee of readability; check the result in its intended destination before relying on it for important work; keep subtitle content until the output has been checked in its intended destination.
Checking subtitle line length
This page counts Unicode characters on each subtitle text line and reports only lines above your chosen limit. It does not count cue numbers or timestamps.
Markup such as <i> can be excluded because viewers do not see the tag characters. The displayed text inside the tag is still counted.
A character threshold is a production choice, not a universal guarantee of readability. Font, player width, language, reading speed, and device size also affect the result.
Frequently asked questions
Does the tool force a 42-character rule?
No. Forty-two is an editable starting value, not a universal standard.
Are HTML-style tags counted?
They are excluded by default, while their visible text remains counted.
Does this automatically wrap subtitles?
No. It identifies long lines so you can decide where to edit them.