Free Online Tool
Line Length Checker
Show the length of every line and flag any that exceed your limit.
The Line Length Checker lets you show the length of every line and flag any that exceed your limit. Paste your text below and the converted result appears immediately — no waiting, no upload, and nothing saved anywhere.
How to use the Line Length Checker
- Paste your original text into the input box.
- Choose any conversion options offered above.
- Copy the converted result, or download it as a .txt file.
- Use Clear to start over with new text.
Key features
- Converts instantly as you type, with no delay.
- 100% private — your text stays in your browser.
- Free to use, with no sign-up and no daily limit.
- Handles both short snippets and long documents well.
Questions
Frequently asked questions
Is the Line Length Checker free to use?
Yes — the 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 the Line Length Checker?
No. The 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 the Line Length Checker on my phone?
Yes. The 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, the Line Length Checker can generally handle as much text as your device can comfortably process.
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