Find Longest Line of Text
Identify the longest line in a multi-line text block. Paste your text and get the longest line in seconds.
Text lines
Paste your text to find the longest line.
Processing happens locally in your browser; nothing is uploaded.
Longest linesAll lines tied for the longest length.
Typical inputs process in under 1ms on modern browsers.
How to find the longest line
Find in 3 steps
Takes ~5 seconds- 1Paste text
Add your multi-line text in the input box.
- 2Find longest line
Click "Find longest line" to scan the input.
- 3Copy output
Copy the longest line for reuse.
Who should use this tool?
- Developers checking log lines
- Editors scanning text blocks
- Teams validating data exports
Examples
Finds a single longest line.
Returns all lines tied for longest.
Handles a single line input.
Keeps spacing in the longest line.
Find the longest line quickly
Identify the longest line in any text block without manual scanning.
Use this longest line finder to locate the longest line in a block of text or line-separated list. Paste your input, run the tool, and copy the longest line instantly. Everything runs locally in your browser for fast, private checks.
Find the longest line without manual scanning.
- Fast output
- No server upload
- Works on any text
Use the longest line in reports or cleanup workflows.
- Bulk paste
- Line-by-line input
- Copy results easily
Longest line tips
Keep line breaks consistent for accurate results.
- Use one entry per line.
- Avoid trailing spaces if they are not meaningful.
- Check line length limits after copying the result.
Frequently asked questions
What if multiple lines are the same length?>
Does this preserve whitespace?>
Is my data sent anywhere?>
Related String tools
Wrap each line of text in square brackets. Paste a list and get bracketed output instantly.
Wrap each line of text in double quotes. Paste a list and get quoted output instantly.
Add a custom prefix to every line in your text. Enter a prefix once and apply it to all lines instantly.
Add a custom suffix to every line in your text. Enter a suffix once and apply it to all lines instantly.
Wrap each line of text in parentheses. Paste a list and get parenthesized output instantly.
Wrap each line of text in single quotes. Paste a list and get quoted output instantly.
Calculate average sentence length instantly. Paste text and get the mean words per sentence in one click.
Calculate average word length instantly. Paste text and get the mean characters per word in one click.
Calculate the total UTF-8 byte size of your text instantly. Paste content and get an exact byte count in one click.
Replace tab characters with four spaces. Clean up pasted text and align indentation instantly.
Replace tab characters with a single space. Clean up pasted text instantly.
Count the number of lines in a text block. Paste your text and get the line count instantly.
Remove empty lines from text. Paste your text and get a cleaner block instantly.
Estimate how long text will take to read. Set words per minute and get instant reading time.
Find the shortest line in a text block. Paste your text and get the shortest line instantly.
Prepend a dollar sign to each line of numbers. Format currency values instantly.
Count the total number of paragraphs in your text instantly. Paste content and get an exact paragraph count in one click.
Strip dollar signs from currency values. Paste your list and get clean numbers instantly.
Collapse multiple spaces into a single space. Clean up pasted text instantly.
Count the total number of sentences in your text instantly. Paste content and get an exact sentence count in one click.
Convert text to lowercase instantly. Paste your text and get lowercase output in seconds.
Convert text to uppercase instantly. Paste your text and get uppercase output in seconds.
Invert the case of every letter. Lowercase becomes uppercase and uppercase becomes lowercase.
Calculate the total character length of your text instantly. Paste any text and get an exact count in one click.
Reverse text line by line. Paste your content and get reversed output instantly.
Estimate AI token count instantly from your text input. Paste content and get a quick token estimate for prompt planning.
Trim each line to a maximum character length. Set a line length count and truncate all lines instantly.
Trim each line to a maximum number of words. Set a word count and truncate all lines instantly.
Count unique words in your text instantly. Paste content and get an exact unique word total in one click.
Count the total number of words in your text instantly. Paste any content and get an exact word count in one click.