Remove Blank Lines

What is Remove Blank Lines?

Remove Blank Lines strips empty lines and optionally whitespace-only lines from text input, with configurable handling for consecutive blank lines. It supports three modes: remove all blank lines, collapse consecutive blank lines into a single one, and remove only leading or trailing blank lines. The tool preserves the original line ending format (LF or CRLF) and handles mixed line endings consistently.

Developers cleaning up generated code output, data engineers preprocessing text files, and writers formatting content for publication. The tool runs entirely in your browser — your data never leaves your device.

How to Use Remove Blank Lines

1. Paste the text containing blank lines into the input area
2. Select the removal mode — remove all, collapse consecutive, or trim edges only
3. Choose whether whitespace-only lines (spaces, tabs) should be treated as blank
4. Copy the cleaned output or download the processed text file

Common Use Cases

• Cleaning up code output that has excessive vertical whitespace between functions
• Normalizing text files before line-count based processing or comparison
• Preparing data files where blank lines would create empty records during import
• Cleaning up copy-pasted content from web pages that includes extra blank lines

Pro Tips

• Use collapse mode rather than remove-all for code — completely removing blank lines between functions or classes makes code harder to read; collapsing preserves logical grouping with single-line separation
• Some file formats use blank lines as record delimiters (LDIF, some CSV variants) — removing all blank lines would merge records; use trim-edges mode to clean only the file boundaries
• Whitespace-only lines and truly empty lines are different — a line with spaces or tabs looks blank but has content; enable the 'treat whitespace-only as blank' option to catch these invisible characters

Why Use This Tool?

• Privacy-first: All processing happens locally in your browser. No data is transmitted to any server.
• No installation required: Works in any modern browser on desktop or mobile.
• Completely free: No account, no credit card, no usage caps.
• Fast and reliable: Powered by modern Web APIs for near-instant results.

Related Concepts

Learn more about related topics: Text normalization, Whitespace trimming, Line endings, Text cleaning.

Frequently Asked Questions