Free Online Tool
Line Length Checker
Check the character length of every line with this free Line Length Checker. Set a maximum length, flag long lines and find the longest line instantly.
Line Length Checker
Check the length of every line in your text with this free online Line Length Checker. Paste your text above to see the character count for each line, identify the longest line, and find lines that exceed a length limit you choose.
The tool analyzes each line separately, making it useful when text needs to stay within a specific number of characters per line.
How to Check Line Length
Paste or type your text into the input box. Each new line is analyzed individually.
To check your text:
- Enter your preferred maximum length in the Max length field.
- Paste or type your text.
- View the character count beside each line.
- Check any lines flagged for exceeding your limit.
- Review the longest line and total number of lines.
The results update automatically as you work with your text.
Check Characters in Each Line
Unlike a general character counter that measures an entire block of text, this tool shows the character length of each individual line.
For example:
Short line
This is a longer line of text.
The tool reports a separate character count for each line, making it easier to find unusually long lines without counting characters manually.
For the character count of your complete text, use the Character Counter.
Set a Maximum Line Length
You can choose your own maximum character length using the Max length setting.
If a line contains more characters than your selected limit, the tool flags that line in the results. A line that exactly matches the maximum is not considered over the limit.
For example, with a maximum length of 20 characters:
- A 15-character line is within the limit.
- A 20-character line is within the limit.
- A 21-character line is over the limit.
This lets you adjust the checker for different writing or formatting requirements.
Find Lines That Are Too Long
When working with multiple lines of text, checking each one manually can be slow. The Line Length Checker identifies lines exceeding your selected maximum and displays the total number under Over limit.
You can then return to those specific lines and shorten them where necessary.
Find the Longest Line in Text
The Longest line statistic shows the character length of the longest line in your input.
This is useful when you want to quickly understand the maximum line length in a block of text without reviewing every count individually.
Line Length vs Total Lines
Line length and line count measure different things.
Line length tells you how many characters appear on an individual line. Total lines tells you how many separate lines are present in the text.
If you primarily need to count the number of lines rather than measure their lengths, use the Line Counter.
Line Length Checker vs Character Counter
A Line Length Checker measures characters separately for every line and can flag lines exceeding a custom limit.
A Character Counter measures characters across the overall text and is better when you need a total character count rather than per-line measurements.
Use the Character Counter when the total length of the entire text matters.
Private Browser-Based Line Length Checking
The checker works directly in your browser, allowing you to inspect line lengths without manually counting characters. You can also copy, download, or print the results using the available controls.
This page now accurately covers its strongest functionality: per-line character counts + custom maximum + over-limit detection + longest line + total lines.
Questions
Frequently asked questions
Is Line Length Checker free to use?
Yes — Line Length Checker is completely free, with no sign-up, no trial period, and no hidden limits.
Is my text uploaded anywhere when I use Line Length Checker?
No. Line Length Checker runs entirely in your browser using JavaScript. Your text is processed on your own device and is never sent to a server.
Can I use Line Length Checker on my phone?
Yes. Line Length Checker works in any modern browser, including on mobile devices, with no app to install.
Is there a limit to how much text I can use?
There's no artificial limit. Because everything runs in your browser rather than on a server, Line Length Checker can generally handle as much text as your device can comfortably process.
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