CRLF ↔ LF Converter

Windows, Unix/macOS, and the old classic Mac historically use different characters to mark the end of a line — CRLF, LF, and CR respectively. Mixing these styles in one file often causes odd artifacts in diffs or editors. This tool converts line endings to one style and detects mixed ones.

How to use it

• Paste text and the tool automatically detects the current line-ending style, including a mixed one.
• Pick a target format (CRLF, LF, or CR) and the conversion happens instantly.
• If several styles are found in the same file, that's flagged with a separate warning.

Common uses

• Fixing a file where git diff shows every line as changed because of differing line endings, even though the content itself didn't actually change.
• Converting a text file to the format a specific system or script expects (a Unix script, for instance, expects LF).
• Debugging why a file opened in a Windows editor shows the entire text on one line (a sign of plain LF with no CR).

Things to keep in mind

Git can automate this conversion itself through core.autocrlf or .gitattributes — often more convenient than converting files in a repository by hand.

Mixed line endings in one file aren't always visible at a glance, but they can break parsers or scripts that expect one specific style.