Remove Empty Lines — Clean Text Online Free
An empty line remover strips blank lines and whitespace-only lines from any block of text. Paste your text below to remove empty lines and clean up your text instantly.
Options
What Is Blank Line Removal?
Blank line removal is the process of filtering out empty lines — lines containing no characters at all — from a block of text. Most tools also treat whitespace-only lines (lines with only spaces or tabs) as blank, since they appear visually empty but can trip up text parsers and import tools.
There are two common modes. Remove all blank lines deletes every empty line so the output has no vertical spacing between content lines. Collapse multiple blank lines reduces runs of two or more consecutive blank lines to a single blank line — preserving paragraph spacing while eliminating excess whitespace.
Blank lines accumulate when copying from web pages, exporting from spreadsheets, editing in multiple tools, or converting between document formats. They are harmless to human readers but cause real problems in data pipelines, code formatters, and import tools that treat each line as a record.
Code Examples for Removing Empty Lines
JavaScript
// Remove all empty and whitespace-only lines
function removeEmptyLines(text) {
return text.split('\n').filter(line => line.trim() !== '').join('\n');
}
// Collapse multiple blank lines to a single blank line
function collapseBlankLines(text) {
return text.replace(/\n{3,}/g, '\n\n');
}
// Remove only truly empty lines (keep whitespace-only lines)
function removeTrulyEmptyLines(text) {
return text.split('\n').filter(line => line !== '').join('\n');
}Python
import re
# Remove all empty and whitespace-only lines
def remove_empty_lines(text):
return '\n'.join(line for line in text.split('\n') if line.strip())
# Collapse multiple blank lines to a single blank line
def collapse_blank_lines(text):
return re.sub(r'\n{3,}', '\n\n', text)
# Process a file
with open('input.txt', 'r') as f:
content = f.read()
cleaned = remove_empty_lines(content)
with open('output.txt', 'w') as f:
f.write(cleaned)Bash
# Remove truly empty lines (grep -v inverts match)
grep -v '^$' input.txt > output.txt
# Remove empty and whitespace-only lines
grep -v '^\s*$' input.txt > output.txt
# Collapse multiple blank lines to one (cat -s squeezes blank lines)
cat -s input.txt > output.txt
# In-place removal with sed
sed -i '/^\s*$/d' input.txtHow to Remove Empty Lines from Text Online
1. Paste your text into the input area. The tool accepts any plain text — code, logs, documents, data files, or anything with unwanted blank lines. Use the example button to see a demo.
2. Choose your options. By default, both truly empty lines and whitespace-only lines are removed. Uncheck “Also remove whitespace-only lines” if you only want to strip completely empty lines.
3. Review the result. The cleaned output appears instantly below the input with a count of how many lines were removed. All non-empty lines are preserved exactly as they were.
4. Copy the result. Click the Copy button to copy the cleaned text to your clipboard for pasting into documents, code editors, or anywhere else.
Why Remove Empty Lines from Text?
Empty lines accumulate in text for many reasons. Copy-pasting between applications, converting document formats, exporting from databases, or editing in multiple tools — all of these introduce unwanted blank lines. While a few blank lines are fine for readability, excessive empty lines make text harder to read, inflate file sizes, and cause issues when importing into other systems.
Cleaning up code: Source code often accumulates extra blank lines as developers add and remove blocks. Code style guides typically limit consecutive blank lines to one or two. This tool strips all blank lines at once, giving you a clean starting point for reformatting. It is especially useful before pasting code into documentation, emails, or presentation slides where space is limited.
Processing log files: Server logs, application output, and build logs often contain empty lines between entries. Removing them makes it easier to scan for errors, count entries, or pipe the output into other tools like grep or awk. Whitespace-only lines are particularly sneaky in logs — they look empty but contain spaces or tabs that trip up simple filtering.
Data cleanup: When preparing data for CSV imports, database inserts, or API payloads, empty lines can cause parsing errors or create phantom records. Stripping blank lines ensures every line in your data file represents a real record.
Document formatting: Text copied from web pages, PDFs, or rich-text editors often includes extra blank lines from layout spacing. Removing them produces clean, compact text that is ready for repurposing in any context.
This tool processes everything locally in your browser. No data is uploaded, no account is required, and there are no limits on text length. Paste, clean, copy, done.
Frequently Asked Questions About Remove Empty Lines
How do I remove empty lines from text?
Paste your text into the input area. The tool instantly removes all blank lines and shows you the cleaned result with a count of how many lines were removed. Click Copy to grab the output.
What's the difference between empty and whitespace-only lines?
An empty line contains absolutely nothing — zero characters. A whitespace-only line looks empty but contains spaces, tabs, or other invisible characters. By default, the tool removes both types. Uncheck the option to keep whitespace-only lines.
Will this tool change my non-empty lines?
No. The tool only filters out empty (and optionally whitespace-only) lines. All other lines are preserved exactly as they are, including their content, indentation, and trailing spaces.
Can I use this to clean up code?
Yes. Removing excessive blank lines from code is a common formatting task. The tool strips blank lines while keeping all code lines intact. It's useful for cleaning up code before pasting into documentation or emails.
How many empty lines can it handle?
There's no practical limit. The tool processes text entirely in your browser, so it can handle thousands of lines instantly. Performance depends on your device, but most texts process in under a second.
Is my text processed securely?
Yes. All processing happens entirely in your browser using JavaScript. Your text is never sent to any server, making it safe for confidential documents, source code, and private content.
Can I keep single blank lines but remove extra ones?
Yes. Toggle the 'collapse multiple blanks' option to reduce consecutive blank lines to a single blank line. This preserves paragraph spacing while eliminating excess vertical whitespace.
How do I remove empty lines in VS Code?
Open Find and Replace (Ctrl+H), enable regex mode, search for ^\s*\n and replace with nothing. This removes all blank lines. For collapsing, search for \n{3,} and replace with \n\n.
What causes empty lines in copied text?
Common sources include: spreadsheet rows with empty cells, HTML with empty <p></p> tags, email clients inserting blank lines between quoted sections, and terminal output with spacing between command results.
Related Free Online Tools
Remove empty lines here, then use our other tools for additional text processing.