01 / PDF
Lines, not sentences
A PDF stores each printed line on its own, so copying it gives a line break wherever the page wrapped.
Free tool
Text copied from a PDF or an email often breaks at the end of every line. Paste it here and the lines join back into flowing sentences, while the gaps between paragraphs stay. Words split with a hyphen at a line end are mended, double spaces are tidied, and you can also join everything into one line or put commas in place of the breaks.
Line breaks
Tidy
Your text is changed in your browser. It is never uploaded.
Why it happens
01 / PDF
A PDF stores each printed line on its own, so copying it gives a line break wherever the page wrapped.
02 / Email
Some email programs wrap plain text at a fixed width, often about 72 to 80 characters.
03 / Columns
Text from narrow columns, slides and subtitles breaks after a few words.
Questions
Not with "Keep paragraphs": a blank line marks a new paragraph and stays. If your text has no blank lines between paragraphs, they are joined too; add a blank line where each one should start, or use "Remove empty lines" instead.
It only joins a word split at the very end of a line followed by a lower case letter, like "but-" then "tons". A word such as "well-known" in the middle of a line is left alone. Rarely, a hyphenated word that happens to wrap at its hyphen is joined; check names and compound words.
Choose "Replace with" and keep ", " in the box. Each line becomes an item: "red", "green", "blue" on three lines become "red, green, blue". Type \n in the box for a new line.
Yes, paste the whole page. For a long PDF, PDF to text pulls out all of its text first; paste that here to join the lines.
No. Everything happens in this tab.