Line Endings Converter

Convert between LF (Unix/Mac) and CRLF (Windows) line endings. Process text files locally in your browser with no data sent to servers.

Input Text

Characters: 0 Lines: 0

Output Text

About Line Endings

Line endings are special characters that mark the end of a line in text files. Different operating systems use different conventions:

LF (Line Feed, \n): Used by Unix, Linux, and modern macOS
CRLF (Carriage Return + Line Feed, \r\n): Used by Windows
CR (Carriage Return, \r): Used by classic Mac OS (rare today)

Common Use Cases

Fixing formatting issues when transferring files between Windows and Unix systems
Preparing scripts for execution on different platforms
Standardizing codebase line endings for version control
Debugging text parsing issues in applications

Examples

Example 1: Convert Windows to Unix format

Input (CRLF): "Hello world\r\nThis is text\r\n"

Action: CRLF → LF

Output (LF): "Hello world\nThis is text\n"

Example 2: Convert Unix to Windows format

Input (LF): "First line\nSecond line\nThird line\n"

Action: LF → CRLF

Output (CRLF): "First line\r\nSecond line\r\nThird line\r\n"

Line Ending Analyzer

Drop text below to detect line ending types:

Frequently Asked Questions

What's the maximum file size I can process?

This tool can handle very large texts (millions of characters) since it processes everything locally in your browser. Performance depends on your device's memory.

Why do line endings matter?

Incorrect line endings can cause scripts to fail execution, text to display incorrectly, or version control systems to show false changes in files.

Which line ending should I use?

Use LF for Unix/Linux/macOS systems and CRLF for Windows. For cross-platform projects, many teams standardize on LF.

Does this tool modify my original files?

No, all processing happens in your browser. Your original files remain unchanged unless you explicitly save the converted output.

Formulas & Assumptions

Conversion Rules:

LF to CRLF: Replace all standalone \n with \r\n
CRLF to LF: Replace all \r\n sequences with \n
Mixed endings are normalized to the target format

Detection Logic:

Count \r\n sequences for CRLF detection
Count standalone \n (not preceded by \r) for LF detection
Count standalone \r (not followed by \n) for CR detection

For informational and educational purposes only. All processing occurs locally in your browser. For compliance critical workflows verify results with official standards or professional tools.

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Line Endings Converter LF CRLF

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