Find & Replace Text — In Browser
Replace a literal phrase or a regular-expression match in a block of text. Use the result and replacement count together when correcting repeated labels or performing a structured edit.
- Runs in your browser
- Nothing is uploaded
- No signup; device limits apply
Numbers stay on your device. Nothing is sent to a server.
How to use this tool
Provide the source, search value and replacement, then choose literal or regular-expression mode. Characters such as dots and parentheses have special meaning in a pattern; literal mode avoids that interpretation.
Results and examples
Replacing cat with dog in cat cat produces dog dog in a global literal replacement. With capture groups, inspect how references such as $1 expand before adopting the edited text.
Limitations
- Expensive expressions on long inputs can make the browser unresponsive.
- Case sensitivity and global matching affect the replacement count and must be checked.
Fields
| Field | Guidance and constraints |
|---|---|
| Haystack | Check the unit and format displayed beside this field. |
| Find | Check the unit and format displayed beside this field. |
| Replace with | Check the unit and format displayed beside this field. |
| Treat find as regex | Check the unit and format displayed beside this field. |
Data handling
Processing stays in the current browser tab; the site does not upload tool input for the calculation itself.
Sources
Frequently asked questions
How are repeated phrases replaced?
Replacing cat with dog in cat cat produces dog dog in a global literal replacement. With capture groups, inspect how references such as $1 expand before adopting the edited text.
What should I check with regular expressions?
Expensive expressions on long inputs can make the browser unresponsive. Case sensitivity and global matching affect the replacement count and must be checked.
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