Are blank lines prefixed too?

Yes by default — every line, including empties, receives the prefix and suffix. Pre-filter with the empty-line remover if you want to skip them.

Can I include special characters in the prefix?

Yes. Any string works, including quotes, backticks, tabs, and Unicode. The values are inserted verbatim with no escaping.

Does it modify the trailing newline?

The output preserves whatever trailing newline the input had. The suffix is added to the line content, not to the file terminator.

Is the input shared with anyone?

No. All wrapping happens locally in your browser.

per-line · prefix + suffix · live

Add a prefix or suffix to every line

Wrap each line with whatever you need — quote marks, bullets, terminators. Optionally skip blank lines.

Add Prefix / Suffix Workspace

Lines

28 B

Output size

34 B

wrapped

Prefix

2 chars

Suffix

—

skip blank

input · lines

output · wrapped

> item one
> item two
> item three

Quick Start

How to add a prefix or suffix to lines

Wrap each line with arbitrary text. Useful for quoting, bulleting, or terminating statements.

01
Paste lines
Drop a newline-delimited list into the input panel — TODO items, SQL statements, email addresses, names, URLs, anything that needs per-line wrapping. The tool splits on \n and operates on each line independently.
Lines preserve their original ordering; only the leading and trailing tokens are added. Paste with ⌘V / Ctrl+V — no upload, runs in-browser.
one per lineTODO listSQL batchnewline split
input · lines2 lines
```
apple
banana
```
11 B · 2 linesraw
02
Set prefix/suffix
Type your prefix and suffix tokens. Common patterns include > for Markdown blockquotes, - or * for bullets, ; for SQL statement terminators, and " / ", for JS/JSON string-array entries.
Both fields accept literal whitespace — type a space after the prefix to get > text rather than >text. The transform re-runs live on every keystroke via React state.
Markdown quotebulletsSQL terminatorJSON arraylive
prefix · suffix> · (none)
```
> apple
> banana
```
15 B · wrappedMD blockquote
03
Skip blanks
By default the Skip blank lines checkbox preserves empty rows untouched — useful for keeping paragraph separation when prefixing a blockquote. Disable it to wrap every line including pure-whitespace ones.
A line counts as blank when line.trim() === "", so lines with only tabs or spaces are treated as empty too.
blank skipwhitespace-onlyparagraph breakpreserve gaps
blanks · skippedtrim() check
```
> a

> b
```
gap preserveddefault ON
04
Copy or download
Hit Copy output to push the wrapped result to your clipboard via the async navigator.clipboard API, or use the download menu to save as .txt.
Everything stays local — open DevTools → Network and you will see zero outbound requests during the transform.
clipboard.txt download100% client-sideno upload
export · 2 actionsready
```
✓ Copied
```
shipped · localsuccess

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 wrap lines

Anywhere you need consistent line wrapping.

Markdown quotes

Prefix every line with > for blockquote. 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

Bullet lists

Add - or * to convert prose to bullets. 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

SQL statements

Suffix ; to a list of statements. 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

String arrays

Wrap each item with " and end with , for JSON/JS arrays.

platform-aware

Comment blocks

Prefix // or # for batch commenting. 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

Email lists

Prefix mailto: for clickable lists. 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

Can I leave one of them empty?

Yes — prefix-only or suffix-only is fine.

What counts as blank?

When 'Skip blank' is on, any line that contains only whitespace.

Does it preserve line count?

Yes — never adds or removes lines, just wraps.

Tab / newline in prefix?

Type them literally — newlines will inject blank lines around each wrap.

Is anything sent to a server?

No. All processing runs locally.

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