Does it remove lines containing only spaces or tabs?

Yes, a line counts as empty if it's blank after trimming whitespace, not just if it has zero characters.

Does it affect the spacing within remaining lines?

No, only whole blank lines are removed; the content of every non-blank line is left exactly as-is.

Does it preserve the order of the remaining lines?

Yes. Lines are filtered rather than reordered, so everything that survives appears in exactly the sequence it had in the original text.

Empty Line Remover Online - Strip Blank Lines from Text

Overview

Introduction

Text copied from a PDF, web page, or generated output often carries extra blank lines that clutter the result.

This tool strips them all in one pass.

What Is Empty Line Remover?

A cleanup tool that filters out every line that's empty or contains only whitespace.

It runs entirely client-side as part of this site's String Tools collection, so nothing you paste is ever uploaded to a server.

How Empty Line Remover Works

The input is split into lines, each line is trimmed and checked for remaining content, and only non-blank lines are kept.

The transformation happens synchronously in JavaScript the moment you type, with no network round trip involved.

When To Use Empty Line Remover

Use it to clean up text copied from a document, tighten up generated output, or prepare a list for further line-based processing.

It's a fast way to get the answer without opening a code editor, a REPL, or writing a one-off script just to check.

Often used alongside Whitespace Remover and String Line Filter.

Features

Advantages

Treats whitespace-only lines as blank, not just zero-length lines.
Leaves the content of remaining lines untouched.
Trims each line only in order to test it, so the lines that are kept survive byte-for-byte including their own indentation.

Limitations

Removes blank lines entirely rather than collapsing consecutive ones to a single blank line.
Removes paragraph separation along with stray blanks, so prose loses its structure and comes back as one continuous block.

Examples

Cleaning up spaced-out text

Input

line one

line two


line three

Output

line one
line two
line three

Every blank line, single or multiple in a row, is removed.

Best Practices & Notes

Best Practices

Use Filter String Lines instead if you need to remove lines matching a specific pattern rather than just blank ones.
Use the Paragraph Spacing Fixer instead on prose, where blank lines mark paragraph boundaries and should be normalized rather than deleted.
Compare the line count before and after to see how much of the document was actually blank.

Developer Notes

A line is kept only if `line.trim().length > 0`, which correctly treats a line containing only spaces or tabs as blank, not just a truly zero-length line.

Empty Line Remover Use Cases

Cleaning up text copied from a PDF or web page
Tightening up generated report output
Preparing a list for line-based processing

Common Mistakes

Expecting the tool to collapse multiple blank lines into one instead of removing them entirely.
Running it on prose hoping for tidier spacing, and losing every paragraph break in the process.

Tips

Pair with Remove All Whitespace if you also need to trim spacing within each line.
A line containing only a tab counts as blank, which catches the invisible leftovers many editors leave behind.

Empty Line Remover