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Find and replace
Find and replace text locally, with an optional regular expression that is rejected when it looks unsafe.
This text stays in the browser. It is not sent to the site.
Limitations
Nested quantifiers and very long patterns are refused. This is not a full sandbox against every slow expression.
How it works
- Type, paste, or choose a local file when the tool asks for one.
- Review the count or the change.
- Copy or download. The source stays on this device.