Clean up stray line breaks copied from a PDF or web page. Replace them with a space or join lines directly, and optionally keep paragraph breaks (blank lines) intact.
Copying a paragraph from a PDF reader or news site often carries along the forced line breaks the layout inserted to fit the screen width. The result: a single sentence gets chopped into several lines, looking awkward once pasted into notes, a translator, or a code editor. This tool strips exactly that kind of forced wrapping while letting you keep real paragraph boundaries.
"Replace with a space" inserts a single space where each line break was so words don't run together (e.g. "hello\nworld" → "hello world"). "Remove outright" deletes the break and inserts nothing, which fits text that already has trailing spaces at line ends.
When cleaning up multi-paragraph text, losing the blank line between paragraphs makes the whole thing unreadable. Turning on "Keep paragraph breaks" leaves blank-line boundaries alone and only collapses the line breaks inside each paragraph.