Line Counter
Count lines, find duplicates, and visualize line length distribution
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Total Lines
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Non-Empty Lines
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Blank Lines
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Unique Lines
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Duplicates
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Avg Length
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Longest Line
Frequently Asked Questions
How does the line counter determine what counts as a line? +
A line is defined by line break characters. Each time a newline character is encountered, a new line begins. Even a single character followed by a newline counts as one line. An empty text box shows 0 lines.
What is the difference between total lines and non-empty lines? +
Total lines counts every line including blank ones. Non-empty lines only counts lines that contain at least one visible character (not just spaces or tabs). Blank lines are the difference between total and non-empty.
How are unique lines calculated? +
Unique lines counts the number of distinct lines in your text. Duplicate lines are only counted once. The comparison is case-sensitive, so "Hello" and "hello" are treated as two different lines.
What does the line length distribution show? +
The line length distribution groups lines by their character count into ranges (e.g., 0-10 characters, 11-20 characters) and shows a horizontal bar chart. This helps you visualize whether your lines are mostly short, long, or mixed.
Can I use this tool for code files? +
Yes! The line counter works great for code. Paste your source code into the text area to quickly see total lines, blank lines (useful for code density metrics), and line length distribution. Many coding style guides recommend keeping lines under 80 or 120 characters.