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Find and Replace a String

Find and Replace a String

Search and replace text or code strings in bulk.

Do you need to manipulate a text file with find-and-replace tool? You may use our online tool to find-and-replace a string or regular expression with a static text, and create a desired text document. You may copy resulting content into the original window with a click of a button, and continue to find-and-replace strings (or regex) until you arrive at the desired content.

Find and Replace a String

Enter the required values and run the tool to view results.

Run case-sensitive find-and-replace with match count and replacement diagnostics.

Input Find Replace with

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What is regular expression (RegEx)?

A regular expression, often referred to as regex, is a sequence of characters that forms a search pattern. It is a powerful tool used for matching and manipulating strings of text based on specific patterns.

Regular expressions consist of a combination of ordinary characters (such as letters and digits) and special characters (metacharacters) that have special meanings. These metacharacters allow you to define complex search patterns, including matching specific characters, character ranges, repetitions, alternatives, and more.

Regular expressions are widely used in programming languages (php, perl, python), text editors, (vi, vim) and command-line tools (awk, sed) for tasks such as data validation, text search and replace, parsing, and pattern matching.

For example, the regular expression pattern "^[A-Za-z]+$" can be used to match a string that consists of one or more alphabetical characters, while the pattern "\d{2}-\d{2}-\d{4}" can match a date in the format "dd-mm-yyyy".

Learning and mastering regular expressions can be a valuable skill for tasks involving text processing and manipulation, and especially necessary skill for softengineers who work with scripting languages. By learning and understanding metacharacters and how they apply to pattern matching, you'll be able to master regex in a few days.

Patterns

A regular expression uses a pattern to match a string. There are literal characters which matches exact character, and wildcard characters that matches a variety of characters. Also, there are symbols that match number of occurances (?, + and *). To give you a flavor of how regular expression works, here are some concepts used to match a text.

Meta Character	Operation	Example	Description
\|	Or	apple\|orange\|pear	Matches apple, orange, or pear
()	Group	gr(a\|e)y	Matches grey or gray
.	Any char	a.c	Matches abc, adc, aMc
?	0 or 1 occurance	colou?r	Matches color or colour
*	0 or more occurance	xyz*	Matches xy, xyz, xyzz
+	1 or more occurance	xyz+	Matches xyz, xyzz, xyzzz
-	Range with bracket	[a-z]	Matches a, b, through z
[]	Or 1 character	[abc]	Matches a, b or c
[^ ]	Not contained	[abc]	Matches any char but a, b or c
^	Beginning of string	^abc	Matches starting with abc
$	End of string	xyz$	Matches string ending xyz
\t	Tab	\t	Matches tab
\n	New Line	\n	Matches new line
\n, n=1..9	Match nth item	(abc\|xyz)\1	Matches abcabc, abcxyz
{n}, n=1..9	match n times	a{3}	Matches aaa

How to use Find and Replace a String

Use Find and Replace a String when you need a fast, browser-friendly way to complete a online task quickly. Enter the required value, review any validation hints, and run the tool to get a clear result that can be copied, downloaded, or used in your next workflow.

This Text Tools utility is designed for repeatable checks and everyday troubleshooting. For best results, use complete and accurate input, review the output carefully, and combine the result with related tools when you need a broader diagnosis.

When this tool is useful

Checking a value before publishing, deploying, or sharing it.
Saving time on routine text tools tasks.
Comparing results with related IPLocation.net tools for a more complete review.
Documenting a result for technical support, SEO work, security review, or development notes.

Find and Replace a String tips

Keep a copy of the original input when comparing results, especially for DNS, web, image, PDF, text, and code tools. If a result depends on live network data, remember that DNS records, HTTP headers, certificates, rankings, and third-party responses can change over time.

Great for editing documents, code, or datasets. Supports batch processing and case-sensitive options.