Line Length Checker
Check line lengths against a maximum width. Flag lines that exceed your limit with line numbers and character counts.
About This Free Online Line Length Checker
Our free online line length checker helps you enforce line length limits in your text. Set a maximum line width (default 80 characters, common for code) and instantly see which lines exceed the limit. Each flagged line shows its line number, character count, and how many characters over the limit it is. Perfect for code style enforcement, email formatting, text wrapping preparation, and maintaining consistent text formatting.
Features of Our Line Length Checker
- Configurable maximum line width (default 80)
- Flagged lines shown with line number and character count
- Shows how many characters over the limit each line is
- Total lines checked and passing percentage
- Summary: lines passing vs lines exceeding limit
- Real-time analysis as you type or paste
- 100% private — browser-only processing
How to Use the Line Length Checker
Using this tool is simple and requires no signup or registration. Follow these steps:
- Paste your text into the input area.
- Set the maximum line width (default 80 characters).
- View flagged lines that exceed the limit.
- Check summary stats for overall compliance.
Frequently Asked Questions About Line Length Checker
What is the standard line length limit?
80 characters is the traditional standard for code (terminal width). 72 characters is common for email and commit messages. 100-120 characters is more common in modern code editors with wider screens.
Does this count tabs and spaces?
Yes. Every character in the line including tabs, spaces, and punctuation is counted toward the line length.
How are over-limit lines counted?
Each line that exceeds the maximum width is listed with its line number, actual character count, and the number of characters exceeding the limit.
Why Choose Text Toolbox?
Text Toolbox provides free, private, and instant online text tools. Unlike other text utility websites that require signup accounts or send your data to servers, all our tools process your text entirely in your browser. This means your content never leaves your device — we cannot see it, store it, or share it. Our tools are fast, lightweight, and work on any device with a modern web browser.