Remove Empty Lines Online – Clean Blank Lines Instantly
Unwanted blank lines are a surprisingly common nuisance. They appear when copying from PDFs, emails, word processors, web pages, or when merging multiple text files. These blank or whitespace-only lines can break formatting, inflate file size, and make content harder to read. That's why a small, focused utility like a remove empty lines tool can save a lot of time and frustration. This page provides a fast, privacy-first tool that removes empty lines or collapses them for tidy output — all inside your browser.
How the Tool Works
Our tool uses a simple JavaScript-based algorithm that parses your text line-by-line. It identifies lines that contain no visible characters (or only whitespace such as spaces and tabs) and either removes them entirely or collapses repeated empty lines into a single blank line—depending on the option you select. Because it runs client-side, the input never leaves your device, ensuring privacy and lightning-fast performance.
Common Use Cases
People use this utility for many practical reasons:
- Writers & editors: Clean up drafts copied from other sources before pasting into CMS editors.
- Developers: Normalize logs, scripts, and configuration files where blank lines may cause confusion.
- Students: Quickly tidy up lecture notes and research snippets.
- SEO professionals: Clean keyword lists and AI-generated content to prepare for publishing.
- Data analysts: Remove blank rows from text exports, making CSV/TSV files easier to import.
Features & Benefits
This tool provides several handy features: remove all blank lines, remove and collapse (turn multiple blank lines into one), trim trailing and leading whitespace for each line, preserve original order, one-click copy, download the result as .txt, and Undo. These features make it useful for both small snippets and very large text blocks.
Privacy & Performance
Privacy is important. Because the tool runs entirely in your browser, your text is never uploaded to our servers. This also means it can function offline after the page fully loads. The JavaScript is lightweight, and modern browsers can handle thousands of lines in milliseconds. For extremely large datasets, browser performance may vary, but for most normal-to-large workloads this utility is extremely responsive.
Tips for Best Results
- If your text has trailing spaces, use the Trim Line Ends option first.
- Use Remove & Collapse when you want to keep paragraph gaps but normalize them to a single blank line.
- Always preview the output before replacing critical files; you can copy the original text back in if needed.
- Use the download button to export cleaned content as a .txt file for backup or import into other tools.