Find & Replace Text Online — Regex & Plain Text, Free

About Find & Replace

Find and replace is a staple of text editing, but the version built into a browser textarea or a basic notes app is usually limited or missing. When you need to swap a recurring phrase across a long document, rename a term in code, or apply a pattern-based substitution, you want real control over how matches are found. This tool gives you bulk find and replace with both plain-text and regular-expression matching, plus a count of exactly how many replacements were made so you can verify the change.

In plain-text mode you type what to find and what to replace it with, and every occurrence is swapped. A "Case sensitive" option, on by default, decides whether Cat and cat are treated as the same word, and a "Whole word" option restricts matches to complete words so replacing cat does not touch category. Switching on "Use regex" unlocks JavaScript regular-expression syntax for advanced patterns, including capture groups: find a pattern like a group of word characters and reference it in the replacement, so you can reformat or rearrange text rather than just substituting fixed strings.

The tool is built to keep you informed. It reports the number of replacements made, and if a regular expression is invalid it shows the specific error message instead of failing silently, so you can fix the pattern. The whole-word option is automatically disabled in regex mode, since regex provides its own word-boundary control, and the interface explains why. A Clear button resets the input and a Copy button captures the result.

Writers use it to enforce consistent terminology, developers to refactor identifiers or clean up data, and editors to apply formatting patterns across long passages. Everything runs in your browser, so even sensitive documents are processed locally and never uploaded.