Line Counter for Code & Text – Count Lines Online Instantly
Need an exact answer to “how many lines is this?” without opening an IDE or a spreadsheet? This free line counter gives you total, blank, unique and duplicate lines the moment you paste text or drop in a file. Built for developers, writers and students across the US and UK, it is instant, free and 100% private, because nothing you enter is ever uploaded.
More statistics and options
Repeated lines
No repeated lines found.
- Processed Locally:
This tool processes your text entirely in your browser. It makes no network requests to upload your data. - How It Works:
Type, paste, or upload text to count lines, words, characters, duplicates, and more. All statistics update instantly as you type or change any option. - File Upload:
You can upload or drag and drop a text file up to 20 MB. Files are read only inside your browser and are never uploaded to any server. - Keyboard Shortcuts:
Press Tab to move between controls, Space or Enter to activate a button, Alt + G to jump to Go to line, and Alt + M to switch light and dark mode.
What Is a Line Counter and Why Do You Need It?
A line counter is a utility that tells you how many lines a block of text contains. That sounds trivial until you are facing a 40,000-line server log, a CSV export or an essay with a strict formatting rule. Counting by hand is slow and error-prone, and a typical editor status bar rarely separates blank lines from real content.
With this tool you can count lines online without installing anything. Paste your text and it reports total lines, non-empty lines, blank lines, words, characters and paragraphs straight away. Every figure updates as you type, so you can watch your line count change while you edit.
One detail trips up many simple tools: how a line actually ends. Windows uses a carriage return plus line feed (\r\n), Linux and modern macOS use a single line feed (\n), and very old Mac files use a lone carriage return (\r). These invisible newline characters are why the same file can show different numbers in different programs. This line counter recognises all three, so a file copied from a Windows laptop, a Linux server or a legacy system returns the same correct result.
It also handles the trailing newline problem. Many files end with a final line break, which can make a naive counter report one extra empty line. By default this tool ignores that last empty line, and you can switch the option off if you want a raw count.
Advanced Features That Make This Tool Different
Most online counters stop at lines and words. This one works more like a text file analyzer. Open the “More statistics and options” panel and you get a set of tools aimed at real work, from code analysis to precise navigation.
Lines of Code Counter & Comment Detection
When you need a quick lines of code counter, the code versus comment split is the feature to reach for. The tool scans every non-empty line and flags comment-style lines, including those that begin with //, /*, #, — or <!–, as well as lines that start with an asterisk inside a block comment. Everything else is treated as code.
You get two separate figures: Code lines and Comment-style lines. That makes it simple to count code lines for a code review, a university assignment or a rough estimate of how much logic a script contains. Detection is based on how a line begins, so treat the numbers as a fast, practical guide rather than a compiler-grade parse. For JavaScript, Python, Java, SQL, HTML or YAML it is accurate enough for everyday checks, and it makes this a handy lines of code counter when a full tool is overkill.
Duplicate Line Finder & Cleaner
Two stats work together here. Unique shows how many distinct lines your text contains, and Duplicate shows how many extra copies exist. Blank lines are never counted as duplicates, so an email list or keyword file gives you a clean result.
You control how strict the matching is. Turn on “Ignore case when finding duplicates” so Apples and apples match, and keep “Trim spaces” on so stray whitespace does not hide a repeat. The panel also lists every repeated line with a badge showing how often it appears. Click an entry and the editor jumps straight to its first occurrence. As a duplicate line finder, it is ideal for auditing a list before you deduplicate your lists with a dedicated cleaner.
Line Length Limit & Navigation
Need to check line length against a rule? Enter a number in the “Flag lines longer than” field (the default is 80 characters) and the tool reports how many lines exceed it. Press “Next long line” to cycle through each offender. This helps with style guides, commit messages, subtitle files and fixed-width formats.
The same panel reports your longest and shortest lines with their exact line numbers, plus the average line length. To move around a large document, use “Go to line” and press Alt + G to focus the input instantly. You can also use “Count lines containing” to search for a word or phrase, see how many lines match and step through them with Next and Previous. Together with the numbered gutter and the “Copy with line numbers” button, it doubles as a simple line number generator.
How to Use This Line Counter (Step-by-Step)
Using this line counter takes four steps, and the interface keeps each one obvious.
- Paste, type, or upload your text. Drop text straight into the editor, press Paste, or use Upload or drag and drop to load a file up to 20MB. Plain text, CSV, log, JavaScript, Python, Java, HTML and many other text-based formats work.
- View your instant stats. The grid shows Total Lines, Non-empty, Blank, Unique, Duplicate, Words, Characters and Characters without spaces. There is nothing to click and no waiting.
- Open “More statistics.” Analyze code lines versus comments, review repeated lines, flag long lines, or search for specific text and count the lines that match.
- Save your work. Use “Copy with line numbers” to put a numbered version on your clipboard, or “Download report” to save a .txt summary of every result.
Who Uses This Text Line Counter?
A good text line counter is useful far beyond programming. Here is how different groups put this one to work.
Software Developers & QA Testers
Developers check log files, estimate lines of code (LOC) for a module, and compare file sizes before and after a refactor. QA testers can paste an error log, search for a keyword such as “ERROR”, and see exactly how many lines match. A sudden jump in your line count can also be an early clue to a stray character, a broken line wrap or a spot where syntax errors are hiding. The Go to line feature and numbered copy make it easy to reference an exact line in a bug report.
Writers, Editors & Students
Writers and editors use the tool to format essays, scripts, poems and captions. Students often face rules such as “no more than 30 lines” or a required number of paragraph breaks, and the answer appears instantly. If you also want a dedicated word counter or paragraph counter, both are available on the site, but the basics of words and paragraphs are already built into this page.
Data Analysts
Before importing a CSV or TSV into a database, analysts need to know how many records they are dealing with. A quick look at total lines tells you whether an export is complete, while blank and duplicate counts reveal messy rows. Spotting a very short or oversized line also helps you catch malformed records before they break a load script, which makes this text line counter a useful pre-flight check.
Privacy and Security – 100% Client-Side Processing
Privacy is built into how this tool works. When you upload a file, your browser reads it locally using the FileReader API. The content is loaded into your device’s memory, analyzed with JavaScript on your own machine and shown on screen. It is never sent over the network.
That means there is no server storage, no account and no copy of your data anywhere. This matters when you are handling sensitive log files, customer exports, proprietary source code or unpublished manuscripts. When you close or refresh the tab, the text is gone.
Frequently Asked Questions
Q1: How do I count lines in a text file online?
Drag and drop your file onto the editor or click Upload. Files up to 20MB are supported, and the results appear instantly in the stats grid. It is the fastest way to count lines online or count lines in text you paste, with no software to install.
Q2: Can this tool count lines of code and ignore comments?
Yes. This line counter reports Code lines and Comment-style lines separately under “More statistics and options.” Lines starting with //, /*, #, — or <!– are treated as comments, so the Code lines figure gives you the real amount of code.
Q3: How does it handle blank or whitespace-only lines?
A toggle called “Count whitespace-only lines as blank” is on by default, so lines containing only spaces or tabs are counted as blank. Turn it off if you want only truly empty lines to be treated as blank.
Q4: Is my uploaded text file safe and private?
Yes. All processing is client-side, so your text stays in your browser. Nothing is uploaded to a server, which makes this line counter suitable for confidential logs and private code.
Q5: Can I find and jump to duplicate lines?
Yes. The “Repeated lines” list shows each duplicate with a count badge and its first line number. Click any entry and the editor jumps straight to that line.
Q6: Does it count words and characters too?
Yes. It works as a word and line counter, with Words, Characters, Characters without spaces and Paragraphs all shown in the stats. For deeper text metrics, try our dedicated character counter.
Q7: How can I copy my text with line numbers added?
Open “More statistics and options” and press “Copy with line numbers.” Your text is copied with a padded number before each line, ready to paste into an email, document or bug report.
Q8: What keyboard shortcuts are available?
This line counter supports Alt + G for the Go to line input and Alt + M to switch between light and dark mode. Use Tab to move between controls and Space or Enter to activate buttons.
Final Thoughts – The Ultimate Free Line Count Tool
Whether you are auditing a log, checking an essay or sizing up a script, this line counter gives you a reliable line count in seconds. It is free, private, handles both code and plain text, and goes well beyond basic totals. Paste your text or drop a file above to get your instant line count.