What regex syntax does it use?

It uses standard JavaScript regular expression syntax. Group references (like $1) can also be used in the replacement string.

Can I search case-insensitively?

Yes. Turn on the "Case-insensitive" option to match regardless of letter case.

Is my text sent to a server?

No. All replacement happens entirely in your browser.

✏️ Find & Replace Text

Find text and replace it with another string. Regular expressions (regex) supported.

Original Text

Find string/pattern Replace with

Use regex Case-insensitive Replace all

Result

How to use

Enter your original text.
Enter the string to find and the string to replace it with.
Turn on the regex option if needed, then click "Replace".

🎯 Use Cases

Fix a typo scattered across many places at once
Mask sensitive-data patterns in a log file
Batch-rename a variable in a code snippet

Example

Input

start: 2026-07-22
end:   2026-07-25

Output

start: 2026/07/22
end:   2026/07/25

With "Use regex" and "Replace all" turned on, setting the find pattern to (\d{4})-(\d{2})-(\d{2}) and the replacement to $1/$2/$3 uses the captured groups ($1·$2·$3) to reformat every YYYY-MM-DD date into YYYY/MM/DD at once.

FAQ

What regex syntax does it use?: It uses standard JavaScript regular expression syntax. Group references (like $1) can also be used in the replacement string.
Can I search case-insensitively?: Yes. Turn on the "Case-insensitive" option to match regardless of letter case.
Is my text sent to a server?: No. All replacement happens entirely in your browser.