Digital Toolchest

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.

0 lines in0 lines outN/A runtime

Typical inputs process in under 1ms on modern browsers.

How to find the longest line

Find in 3 steps

Takes ~5 seconds
  1. 1
    Paste text

    Add your multi-line text in the input box.

  2. 2
    Find longest line

    Click "Find longest line" to scan the input.

  3. 3
    Copy output

    Copy the longest line for reuse.

Useful for log analysis, copy editing, and checking line length limits.

Who should use this tool?

  • Developers checking log lines
  • Editors scanning text blocks
  • Teams validating data exports

Examples

Finds a single longest line.

"short line this is the longest line in the list mid" -> this is the longest line in the list

Returns all lines tied for longest.

"short this is the longest line this is the longest line mid" -> this is the longest line this is the longest line

Handles a single line input.

"only one line" -> only one line

Keeps spacing in the longest line.

"short long line with spaces mid" -> long line with spaces

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.

Instant results

Find the longest line without manual scanning.

  • Fast output
  • No server upload
  • Works on any text
Copy ready

Use the longest line in reports or cleanup workflows.

  • Bulk paste
  • Line-by-line input
  • Copy results easily
Privacy first: we never send your input to a server. Everything runs locally in your browser.

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?>
The tool returns every line tied for the longest length.
Does this preserve whitespace?>
Yes. Lines are compared as pasted, without trimming.
Is my data sent anywhere?>
No. All processing happens locally in your browser.

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