Line breaks that were meaningful in one context often become a problem in another. Text copied from a PDF or an email often wraps every visible line with a hard line break, which looks fine on screen but turns into an unreadable stack of short fragments once pasted into a form field, a spreadsheet cell or a database that expects one continuous paragraph. Remove the wrong line breaks and you get a wall of text with no structure left; remove the right ones and you get back the flowing paragraph the author actually intended.
Everything happens locally in your browser as a plain text transformation. Nothing you paste is uploaded, so a private message, an internal document or an unpublished manuscript stays exactly where it started while you clean it up.
The three ways this tool can remove line breaks
Each mode solves a different version of the same underlying problem, and picking the right one depends on what you are pasting from and what you need the result to look like.
- Remove all breaks: every line break becomes a single space, collapsing the whole input into one continuous line or paragraph.
- Keep paragraph breaks: single line breaks within a paragraph are collapsed, but a blank line between paragraphs is preserved, restoring normal paragraph structure.
- Replace with a separator: every line break is replaced with whatever text you choose, such as a comma and space, useful for turning a pasted list into a single delimited line.
Why text pasted from a PDF or an email needs this most often
PDF readers and many email clients insert a hard line break at the end of every visible line so the text wraps consistently regardless of the reading width, rather than relying on the reader's own software to wrap long lines automatically. Copy a paragraph out of a PDF and paste it somewhere else, and every one of those hard breaks comes along, turning what was one paragraph into dozens of short, disconnected lines the moment the destination does not rewrap them the same way.
This is different from a genuine paragraph break, which is usually represented by a blank line rather than a single line break, and that distinction is exactly what the keep paragraph breaks mode is built to preserve, collapsing the accidental mid sentence breaks while leaving the real structural ones alone. The end result is exactly what people mean when they ask how to join lines into paragraph form instead of a stack of short fragments.
Choosing a custom separator instead of a space
Replacing line breaks with a plain space is right for restoring prose, and it is the most common choice, so much so that people often describe the whole task as wanting to replace line breaks with space rather than naming the separator explicitly. Sometimes the goal is different, turning a pasted column of values into a single comma separated line for a spreadsheet formula, or into a pipe separated line for a configuration file. Setting a custom separator, such as a comma followed by a space, handles that in one step instead of a manual find and replace afterward.
How this remove line breaks tool detects breaks
Text files use different characters to represent a line break depending on the operating system that created them: a single line feed on macOS and Linux, and a carriage return followed by a line feed on Windows. This tool checks for both forms so a file created on either platform is handled correctly, rather than leaving stray carriage return characters behind that would otherwise show up as an invisible extra character in the result.
How to remove line breaks from text
- 1
Paste your text
Drop a text file or paste text that has unwanted line breaks, often pasted from a PDF or an email.
- 2
Choose how to handle breaks
Pick remove all breaks, keep paragraph breaks, or replace breaks with a separator you type in.
- 3
Set a separator if needed
If you chose the replace option, type the exact text that should stand in for each line break, such as a comma and space.
- 4
Clean up and copy
Press remove line breaks to produce the final text, then copy it or download it as a plain text file.
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Sources and further reading
- MDN: String.prototype.replaceThe browser method this tool uses to find and replace line break characters throughout the text.developer.mozilla.org
- RFC 5198: Unicode Format for Network InterchangeDefines the carriage return and line feed conventions this tool checks for when detecting a line break.rfc-editor.org
Frequently asked questions
Common questions about the remove line breaks.
Yes. The transformation happens entirely inside your browser using JavaScript string operations, so a file you drop in or text you paste is never sent to a server. You can confirm this by checking your browser's network activity while running the tool, which shows no outgoing request carrying your text.
Choose the keep paragraph breaks mode. It looks for blank lines, a strong signal of an intentional paragraph break, and preserves them, while collapsing any single line break within a paragraph into a plain space. This is the mode to use for text pasted from a PDF or email that wraps every visible line with a hard break.
Yes. Choose the replace with a separator mode and type a comma, or a comma followed by a space, as the separator. Every line break in the text is replaced with exactly what you typed, which turns a pasted column of values into a single comma delimited line in one step.
Yes. Windows text files typically use a carriage return followed by a line feed to mark a line break, while macOS and Linux use a line feed alone. This tool checks for both forms so text copied from either kind of source is processed correctly without leaving stray characters behind.
It is treated the same as any other line break in whichever mode you have selected. In remove all breaks mode it becomes a space, which the tool then trims from the very start and end of the result so you do not end up with an accidental leading or trailing space in the final text.
This tool does not keep an undo history once you leave the page, so keep a copy of your original text if you might need it later. If you replaced line breaks with a specific separator, you can reverse the change afterward using a find and replace tool to turn that separator back into a line break.