Line Counter
Count lines of text online — total lines, non-empty lines, unique lines, longest line and average line length. Free, instant and private.
About the Line Counter
This free line counter analyses any multi-line text and instantly reports the numbers that matter: total lines, non-empty lines, unique lines, empty lines, the longest line in characters and the average line length. Paste code, a log file, a CSV export, a mailing list or an essay — every line break starts a new line, and all six statistics update live.
The unique-lines count is especially useful for spotting duplicates in lists: if total lines say 500 but unique lines say 480, you have 20 duplicate entries. The longest-line stat helps developers enforce line-length limits and helps editors find run-on lines, and a preview of the longest line is shown so you can see exactly which one it is.
Everything is calculated in your browser. Nothing is uploaded, so it is safe to paste logs, code or customer lists.
How to Use the Line Counter
- 1Paste your multi-line text, list or code into the box.
- 2Read the live statistics: total, non-empty, unique and empty lines.
- 3Check the longest line preview and the average line length.
- 4Edit or re-paste and watch the counts update instantly.
Frequently Asked Questions
How do I count the number of lines in a text file?
Open the file, select all (Ctrl+A), copy, and paste it into this tool. The total line count appears instantly, along with non-empty, unique and empty line counts. This is usually faster than opening a terminal and running wc -l, and it works on any device with a browser.
What counts as a line?
Every line break (Enter key, \n, \r\n or \r) starts a new line, so the tool handles text from Windows, macOS and Linux equally well. A line with only spaces counts toward total lines but not toward non-empty lines, so you can see how much of your text is actual content.
How can I find duplicate lines in a list?
Compare the "Total lines" and "Unique lines" stats. If they differ, the difference is the number of duplicate lines. For example 1,000 total with 950 unique means 50 lines appear more than once — common when de-duplicating email lists, keywords or log entries.
Does the line counter work for source code?
Yes — paste any code and you get a quick lines-of-code count. Total lines gives the raw file length, and non-empty lines is a rough LOC metric that ignores blank spacing lines. The longest-line stat is handy for checking code style limits like 80 or 120 characters.
Is there a limit on how much text I can paste?
There is no fixed limit. Because everything runs locally in your browser, even files with hundreds of thousands of lines are counted in a fraction of a second, and your text is never uploaded to any server.