Fast and simple: copy/paste text into the top box, type in a regular expression, and replace (or remove) all matches. Then copy/paste the results from the bottom box.
Features:
- Check-as-you-type regexp matching
- Live preview of replacement, constantly updated
- Immediate feedback on errors, number of matches, etc
- Copy/paste your text straight into the app
- Drag/drop a file into the app to use that for the input
