Code Line Counter is a free, browser-based tool built for developers who want a quick line count for a file, snippet or pull request without opening an IDE.
It recognises // and # single-line comments and /* */ block comments.
How to use the Code Line Counter
- Paste your source code into the box.
- The line breakdown updates instantly as you type.
- Use it to sanity-check the size of a diff or file before a code review.
- Works with any language that uses // # or /* */ style comments.
Why use FreeToolsNets's Code Line Counter?
- 100% free, with no usage limits and no account required.
- Everything runs locally in your browser — nothing you type is uploaded or stored on a server.
- Works on desktop, tablet and mobile in any modern browser.
- No installation, no plugins, and no ads blocking the tool itself.
- Part of FreeToolsNets's Developer & Data Tools collection.
Frequently asked questions
Which comment styles are detected?
Single-line // and # comments, plus /* */ block comments; language-specific styles like Python docstrings aren't parsed.
Does it detect the programming language?
No — it counts lines using generic comment heuristics that work across most C-like and scripting languages.
Is this tool free to use?
Yes, completely free on FreeToolsNets, with no sign-up and no limits.
Is my data sent to a server?
No. Everything runs locally in your browser using JavaScript — nothing you enter is uploaded anywhere.
Does it work on mobile?
Yes, the widget is fully responsive and works on phones, tablets and desktops.