Find and replace text in seconds, free. Paste your text, enter what to find and what to put in its place, with case-sensitivity and regular expression options.
Type the phrase to find and its replacement, then choose Replace all for the whole document or Replace first for a single change. Options include case-sensitive matching, whole-word matching (so "cat" does not match "catalog"), and full regular expressions for patterns like dates or emails. The match count tells you exactly how many replacements were made.
Use the "Use as input" button to feed the result back into the input box, so you can run several find-and-replace passes in a row: for example, first fix one term, then another, without copying between steps.