⌘ K
literal · regex · live preview

Find & replace with regex support

Literal or regex search, case-sensitivity toggle, multiline mode. Live match count and preview as you type.

Find & Replace Workspace
Input size
99 B
3 lines
Output size
99 B
3 lines
Matches
4
literal
Status
OK
case-sensitive
FindReplace
input · source text
output · replaced
The swift brown fox jumps over the lazy dog.
The swift brown fox is swift.
Foxes are swift animals.
Quick Start

How to find and replace text

Classic find/replace with optional regex mode for power users. Live match count helps you confirm the pattern matches what you expect before committing the replacement.

  1. 01

    Paste source text

    Drop any text. Live updates as you change the search pattern.

    Tokenisation is Unicode-aware via \p{L}\p{N} property classes — so accented letters, ideographs, and emoji code points all count correctly.

    any textUTF-8Unicodecode pointslive
    input · textsource · UTF-8
    The quick brown fox…
    loaded · UTF-8UTF-8 · ready
  2. 02

    Type Find & Replace

    Literal mode escapes regex metacharacters; regex mode treats them as patterns.

    Live re-counts run on every keystroke through a memoised reducer, so even multi-megabyte inputs stay smooth in the editor.

    findreplacelivememoisedoptions
    pattern · optionsquick → swift · live
    quick → swift
    options applied · livelive
  3. 03

    Toggle modes

    regex, case, multiline. Multiline only matters in regex mode (changes ^ and $ behavior).

    .*Aa
    flagsg + i
    /quick/gi
    modes
  4. 04

    Preview matches

    Match count shown in stats. Copy or download once you're happy with the result.

    Copy writes via the Async Clipboard API; downloads ship as text/plain; charset=utf-8 — nothing leaves your tab.

    previewclipboardtext/plainblobclient-side
    ok · copiedmatches · done
    3 matches → replaced
    ready · 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.

Related toolsBulk Find & ReplaceText DiffRemove DuplicatesRemove WhitespaceCase ConverterRegex Tester
Use Cases

When to find & replace

Anywhere you'd run sed or use your editor's find/replace — but you want it portable.

Renaming variables

Quick batch rename across pasted code. 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

Cleaning logs

Strip PII, anonymize IDs, redact tokens. 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

Translating content

Swap stock phrases across a draft. 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

Test fixtures

Replace placeholder hostnames before committing. 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

Markdown cleanup

Convert bullets, links, or formatting marks. 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

Quick refactors

Outside an IDE — paste, replace, paste back. 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

Yes — toggle .* regex mode to enable. Disabled by default; literal text mode escapes regex metacharacters automatically.
Enable regex mode and use $1, $2, etc. in the Replace field.
Only relevant in regex mode — makes ^ and $ match the start/end of each line, not just the whole input.
Yes — all matches are replaced (regex /g flag is always on).
No. All processing runs locally.
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