Remove Empty Lines
Remove empty, blank, and whitespace-only lines.
📘 How It Works
Line Separation
Text is split on newline characters (\n) to create an array of lines. Each line is then evaluated for emptiness.
Empty Line Detection
A line with length === 0 is truly empty. This catches lines that are just newline characters with no content between them.
Whitespace-Only Detection
When enabled, line.trim().length === 0 catches lines containing only spaces, tabs, or other whitespace characters.
Filter Operation
JavaScript's filter() method creates a new array containing only lines that pass the non-empty check. Original line order is preserved.
Statistics Tracking
The tool counts lines before and after filtering, showing exactly how many empty lines were removed for verification.
💡 Common Use Cases
Code Formatting
Remove excessive blank lines from code files. Maintain consistent vertical spacing according to style guides.
Document Cleanup
Clean up pasted content from PDFs or web pages that often contains extra line breaks.
Data Processing
Prepare data files by removing blank lines before parsing or importing into databases.
Log Compression
Remove empty lines from log files to reduce file size and improve readability.
Markdown Cleanup
Clean markdown files with excessive blank lines that cause unwanted spacing in rendered output.
CSV/Text Preparation
Remove blank rows from text data before converting to CSV or other structured formats.