Text Tools

Find & Replace

Find and replace text with regex support, capture groups, whole-word matching, and case-insensitive mode. Replace all occurrences or just the first.

Regex Mode
Capture Groups
Replace All / First
Whole Word
Case-Insensitive

Find

Replace with

Options

Case insensitive

Regular expression

Whole word only

Input text

Enter text and click Replace

Find and replace text

Plain replacement handles simple substitutions, while regular expressions describe patterns such as IDs, whitespace, or email-like strings. Use capture groups in replacement text with $1, $2, and later references.

Modes

Option	Effect
Plain text	Escapes regex characters automatically
Regex	Uses JavaScript regular-expression syntax
Case insensitive	Matches letter case variants
Whole word	Adds word boundaries in plain-text mode

text.replace(/hello/gi, "hi");

import re
result = re.sub(r"hello", "hi", text, flags=re.I)

Test complex patterns against representative input before applying replacements to production files. Invalid expressions are reported instead of changing output.

Frequently Asked Questions

Does this support regular expressions?: Yes. Enable the 'Regex' option to use JavaScript regular expression patterns in the Find field. All standard JS regex syntax is supported, including capture groups, lookaheads, and flags.
Can I use capture groups in the replacement?: Yes. When Regex mode is enabled, use $1, $2, etc. in the Replace field to reference capture groups. Named groups can be referenced with $<name>. For example, find '(\w+)\s(\w+)' and replace with '$2 $1' to swap two words.
What does 'Match whole word' do?: 'Match whole word' wraps the search term with word boundary assertions (\b) so that 'cat' only matches standalone 'cat', not 'catch', 'concatenate', or 'tomcat'. This option is not available in regex mode where you control boundaries yourself.
Is the replacement case-sensitive by default?: Yes. By default, matching is case-sensitive. Enable the 'Case insensitive' flag to match regardless of letter case.
How many replacements are made?: By default, all occurrences are replaced (global mode). You can switch to 'Replace first only' to replace just the first match found.

Disclaimer

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Some tools may use AI, automated processing, third-party services, or server-side processing. Do not rely on these tools as a substitute for professional advice.

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Find and replace text

Modes

Option

Effect

Plain text

Escapes regex characters automatically

Regex

Uses JavaScript regular-expression syntax

Case insensitive

Matches letter case variants

Whole word

Adds word boundaries in plain-text mode

text.replace(/hello/gi, "hi");

import re result = re.sub(r"hello", "hi", text, flags=re.I)

Test complex patterns against representative input before applying replacements to production files. Invalid expressions are reported instead of changing output.

Frequently Asked Questions

Does this support regular expressions?

Yes. Enable the 'Regex' option to use JavaScript regular expression patterns in the Find field. All standard JS regex syntax is supported, including capture groups, lookaheads, and flags.

Can I use capture groups in the replacement?

Yes. When Regex mode is enabled, use $1, $2, etc. in the Replace field to reference capture groups. Named groups can be referenced with $<name>. For example, find '(\w+)\s(\w+)' and replace with '$2 $1' to swap two words.

What does 'Match whole word' do?

'Match whole word' wraps the search term with word boundary assertions (\b) so that 'cat' only matches standalone 'cat', not 'catch', 'concatenate', or 'tomcat'. This option is not available in regex mode where you control boundaries yourself.

Is the replacement case-sensitive by default?

Yes. By default, matching is case-sensitive. Enable the 'Case insensitive' flag to match regardless of letter case.

How many replacements are made?

By default, all occurrences are replaced (global mode). You can switch to 'Replace first only' to replace just the first match found.

Disclaimer

Some tools may use AI, automated processing, third-party services, or server-side processing. Do not rely on these tools as a substitute for professional advice.