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Replace multiple words throughout your text at once. Build any number of rules—combine literal text search with optional regex and capture groups. This is a word-substitution tool, not an AI rewriter.
1. Paste the text you want to transform above.
2. Add one or more find → replace rules.
3. Watch the result update live.
4. Copy the result or download it as a .txt file.
Rules apply top to bottom, and each rule sees the output of the one above it, so ordering is a feature. For example, replace "cat" with "tiger", then "tiger" with "lion", and every original "cat" ends up as "lion".
By default, "find" matches literal text and needs no regex knowledge. Toggle "Regex" per rule to treat the pattern as a JavaScript regular expression with capture groups (2026)-(07) and references like $1-$2.
Turn on "Case-sensitive" to distinguish Hello from hello. Turn on "Whole word" so "test" is skipped inside "testing".
The MVP uses a best-effort deadline guard (500ms timeout). Even a catastrophic-backtracking regex won't freeze your tab permanently, but you may see a brief delay. Phase 2 will upgrade to a Web Worker for a hard guarantee.
Your rule-sets are stored in your browser's localStorage. Nothing is sent to a server. Clearing your browser cache will delete them.
Yes, toggle "First only" to replace only the first match. For step-by-step replacement, you'd need to reload and repeat—this tool is optimized for replace-all.