Line Counter

Count total lines, empty lines, content lines, and the longest line length.

Category: Text Tools

When to use?

Use it to check the line count of a log file or CSV data, or to find whether a document has any very long lines.

How to use

  • Paste the text into the input.
  • Total lines, empty lines, content lines, and longest line length are shown.

Input Explanation

Enter a log file, code, or plain text data to count lines.

Calculation Basis

It splits text by line breaks (\n or \r\n) for the total array length, then counts elements that are empty or whitespace-only as empty vs. content lines.

Usage Examples

  • Check log line count - Check total and empty line counts of log or CSV text.
  • Inspect document structure - Check for long lines to inspect a document or data shape.
  • Count code lines - Paste source code to check total and empty line counts.

Examples

  • 3 lines with 1 fully empty → 3 total, 1 empty, 2 content
  • Paste 1,000 CSV lines → instantly see total lines and longest line length

Cautions

  • Counts can vary by how line-break characters (LF/CRLF) are handled.
  • Results may differ from other tools depending on whitespace and Unicode handling.

Guides

Line counting

It shows total lines, empty lines, and content lines separately, counting by line-break characters (\n).

Inspect code and data

Useful for finding source LOC (lines of code) or quickly checking the row count of CSV data.

FAQ

Are empty lines included in the total?

Yes, the total includes empty lines and the empty-line count is shown separately.

What is the basis for the longest line?

Each line's length is measured by Unicode characters, showing the longest value.

How are content lines counted?

It counts only lines with actual characters, excluding whitespace-only lines.

Is line count the same as item count?

For one-item-per-line data, line count equals item count; a trailing empty line can cause a difference.

Related Tools

  • Character Counter - Count characters with and without spaces, and line count, in real time.
  • Byte Counter - Calculate the byte length of text when stored as UTF-8.
  • Case Converter - Convert text, variable names, and filenames to UPPER, camelCase, snake_case, kebab-case, and more.
  • Whitespace Remover - Remove whitespace in various ways — leading/trailing, duplicate, or per-line.
  • Duplicate Line Remover - Remove duplicate lines from text, keeping only unique lines.
  • Line Sorter - Sort each line of text in ascending/descending order, or shuffle randomly.