Does it handle Windows CRLF and Mac CR endings?

Yes. \r\n, \n, and lone \r are all detected and removed or replaced.

What's the difference between "join with space" and "join directly"?

Join with space replaces each line break with a single space, useful for PDF-extracted prose. Join directly concatenates lines with no separator, useful for fixing hard-wrapped strings.

Will consecutive blank lines collapse too?

Yes. Empty lines disappear along with their breaks, leaving one continuous run of text.

Where is the text processed?

In your browser. The input is never sent over the network.

strip all · join with space · collapse blanks

Remove line breaks

Strip every \n, join broken lines with a space, or collapse runs of blank lines.

Remove Line Breaks Workspace

Input lines

41 B

Output size

35 B

1 lines

Mode

strip

scope

Removed

6 B

breaks

input · multi-line

output

line oneline twoline threeline four

Quick Start

How to remove line breaks

Three ways to flatten or compress newlines — pick what matches your downstream tool.

01
Paste text
Multi-line input.
Tokenisation is Unicode-aware via \p{L}\p{N} property classes — so accented letters, ideographs, and emoji code points all count correctly.
linesUTF-8Unicodecode pointslive
input · textraw · UTF-8
```
A
B
C
```
loaded · UTF-8UTF-8 · ready
02
Strip all
Removes every \n — output is on one line with words running together.
Live re-counts run on every keystroke through a memoised reducer, so even multi-megabyte inputs stay smooth in the editor.
striplivememoisedoptionssnappy
output · optionssingle line · live
```
ABC
```
options applied · livelive
03
Join with space
Replaces breaks with spaces — useful for unwrapping broken paragraphs.
Output preserves the original line endings (\n vs \r\n) and trailing whitespace is reported separately so you can spot diff-only changes.
joinline endingswhitespacediff-cleanreproducible
output · countedjoined · ready
```
A B C
```
counted · livecounted
04
Collapse blanks
Keeps single newlines, drops blank lines.
Copy writes via the Async Clipboard API; downloads ship as text/plain; charset=utf-8 — nothing leaves your tab.
collapseclipboardtext/plainblobclient-side
compact · copiedready · done
```
✓ Copied
```
shipped · ready to shipsuccess

Pro tips

Text-processing fundamentals worth knowing

Tokenise with Unicode classes

Use \p{L}\p{N} with the u flag so accents, ideographs, and emoji count properly.

Normalise line endings

Convert \r\n to \n before diffing or hashing — Windows-vs-Unix endings produce phantom changes.

Mind invisible characters

Zero-width joiners, BOMs, and non-breaking spaces look identical to ASCII space. Strip them before comparison or storage.

Stream don’t slurp

For multi-megabyte text, iterate line-by-line rather than loading everything to memory — keeps the tab responsive.

Choose collation deliberately

Default JS sort is code-point order, not human alphabetical. Use Intl.Collator for locale-aware sorting.

Re-run after normalisation

NFC vs NFD changes byte length but not visible glyphs. String.prototype.normalize() before counts and comparisons.

Use Cases

When to remove line breaks

Anywhere multi-line text needs flattening.

Form fields

Paste multi-line content into a single-line input. Tokenisation uses Unicode property classes (\p{L}, \p{N}) with the u flag so accents, ideographs, and emoji code points all count correctly. Surrogate-pair-aware counts mean 🚀 weighs 1, not 2.

Unicode-correct

URL params

Strip newlines before encoding URLs. Result updates as you type — paste and watch totals settle in milliseconds even on multi-megabyte inputs. Heavy work runs through a memoised reducer so the editor never janks.

diff-clean

Email subjects

Strip accidental newlines from copied subject text. Output normalises line endings to LF for clean diffs across platforms. Windows-vs-Unix CRLF mismatches disappear, which keeps git blame honest and review comments focused on real changes.

instant counts

PDF paste

Unwrap PDF-extracted prose that broke mid-paragraph. Code-point counts are stable across NFC/NFD normalisation. Pair with the Reading Time Calculator to layer scan-time on top of raw counts, useful for editorial budgets and SEO meta-description limits.

platform-aware

Database fields

Single-line cells in DB exports. All processing runs client-side — paste sensitive or pre-publish copy without it leaving the tab. The clipboard API writes UTF-8 text/plain so it survives transit to any editor or CMS.

code-point-accurate

Compact JSON values

Convert multi-line strings to single-line before embedding. Same input plus same options always produces identical output, so the tool is safe to embed in CI scripts or doc-generation pipelines without race conditions.

lossless

FAQ

Frequently asked questions

What's the difference between strip and join?

Strip removes newlines without replacement (words concatenate). Join replaces newlines with a single space (words stay separated).

Does it handle Windows line endings?

Yes — both \r and \n are treated as line breaks.

Are runs collapsed?

In 'extra' mode, yes — multiple consecutive newlines become one.

Is anything sent to a server?

No. All processing runs locally.

What about line breaks inside strings?

Not parsed — treated as regular newlines. For escape-aware processing use JSON Escape.

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