Joins wrapped lines back into continuous text. The usual cause is copying out of a PDF, where every line ends at the edge of the column rather than at the end of a sentence — and where a naive "replace all newlines" also destroys the paragraph structure.
Why paragraphs are handled separately
Turn the option off if you genuinely want everything on one line — building a single-line CSV field, or a value for a config file.
Hyphenation from PDFs
hyphen- ation. There is no reliable automatic fix, because a genuine hyphen in "well-known" is indistinguishable from a typesetting one without a dictionary. Scan the result if the source was a typeset document — it is usually a handful of words.Line endings
Other names for this
Also searched as “remove newlines”, “join lines”, “unwrap text”, “delete line breaks”.
Questions
- My paragraphs got merged into one.
- The source separated them with a single line break, not a blank line, so there was no boundary to detect. Insert blank lines first, or accept the single block.
- Can I use this to build a comma-separated list?
- Yes — set “Join lines with” to a comma and turn off “Keep paragraph breaks”.
- Does my text leave the browser?
- No. Everything runs as JavaScript in this tab — there is no server involved and no request is made. Open the Network panel and watch, or turn your Wi-Fi off and keep using the tool.