Find & Replace
Search and replace text with plain or regex matching.
About the Find & Replace
Find and replace text using plain string matching or full regular expressions with g/i/m/s flags, complete with a live match count and highlighted preview so you can verify changes before applying them.
Popular uses
- find and replace
- regex replace
- search and replace
- regular expression
Examples
Replace word
cats and catsOutput
dogs and dogsKeyboard shortcuts
- Copy the main outputCtrl / ⌘ + Shift + C
- Download the resultCtrl / ⌘ + S
- Share this toolCtrl / ⌘ + Shift + S
- Reset the inputsAlt + R
- Open the tool search paletteCtrl / ⌘ + K
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Works well with
Next steps from other categories.
Regex Cheatsheet
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Searchable regex syntax reference with examples and copy buttons.
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Test regular expressions with live match highlighting.
Frequently asked questions
Read more
- Regex patterns every developer should know
A working set of regular expressions for emails, URLs, whitespace and validation — plus how to test them safely.
- Testing a regex once, then shipping it in JavaScript, Python, Java and Go
Regex syntax is portable in theory and fiddly in practice. Here is how to test a pattern, read its groups, and export a working snippet for seven languages.
- Line diff is not enough: word and character diffs for prose, config and JSON
Line-based diffs mark a whole paragraph as changed when one word moved. Word and character granularity, unified patches and side-by-side views each solve a different problem.
Version 1.0.0 · Updated 2026-08-06 · Runs entirely in your browser