Regex Match Tester & Visualizer
About Regex Escape Tool
The Regular Expression String Escape Utility escapes all 14 special RegExp metacharacters (`\`, `^`, `$`, `.`, `|`, `?`, `*`, `+`, `(`, `)`, `[`, `]`, `{`, `}`) in literal text strings, generating safe patterns for `RegExp()` constructors in JavaScript, Python, PHP, Go, and Rust.
How to Use Regex Escape Tool
Step 1
Type or paste your raw text into the input area.
Step 2
Select programming language syntax preference.
Step 3
Review the escaped regex pattern and code snippets.
Step 4
Click "Copy Escaped Regex".
Practical Use Cases for Regex Escape Tool
Safely Searching User Input via Dynamic Regular Expressions
Escape user search query strings containing brackets, question marks, and parentheses (e.g. `file (1).zip?`) to prevent regex syntax errors in `new RegExp(query)`.
Generating Safe Replace Patterns in JavaScript & Python
Escape literal strings before passing them to `string.replace(new RegExp(pattern, "g"), replacement)`.
Input & Output Examples
Escaping Search Query with Regex Characters
`price: $10.00 (tax incl.) [yes/no]?`
`price: \$10\.00 \(tax incl\.\) \[yes\/no\]\?`
Key Features & Performance
- ✓Escapes all 14 metacharacters: `\`, `^`, `$`, `.`, `|`, `?`, `*`, `+`, `(`, `)`, `[`, `]`, `{`, `}`.
- ✓Language snippets: JavaScript (`RegExp.escape` proposal & polyfill), Python (`re.escape`), PHP (`preg_quote`), Go (`regexp.QuoteMeta`), Rust (`regex::escape`).
- ✓Double-escape mode for JavaScript string literal constructors (`\\.`).
- ✓100% Client-Side memory execution.
- ✓1-Click Copy escaped regex.
Key Terminology & Definitions
RegExp Metacharacters
Characters with reserved syntactic meaning in regular expression engines that must be preceded by a backslash (`\`) to match literally.
`RegExp.escape()` Proposal
An ECMAScript TC39 proposal to add a built-in static method for escaping arbitrary strings for use in regular expressions.