JavaScript String Escape Tool

Safely escape strings for JavaScript code to prevent XSS attacks and ensure proper string handling. This tool handles special characters, quotes, and Unicode encoding for all JavaScript environments.

Input String:

Escape Quotes

Escape Unicode

Escape Special Chars

Escaped Result:

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About JavaScript String Escaping

JavaScript string escaping is essential for safely handling strings in your code, especially when:

Inserting user-generated content into JavaScript code
Dynamically generating JavaScript from server-side code
Preventing XSS (Cross-Site Scripting) vulnerabilities
Working with strings containing quotes or special characters
Encoding strings for JSON data

Example Usage

Here's how escaped strings would be used in actual JavaScript code:

Basic String Escaping

const escapedString = 'escaped_string_here';
document.getElementById('output').textContent = escapedString;

Dynamic Script Generation

const userInput = 'escaped_user_input_here';
const script = `<script>processInput("${userInput}");</script>`;
document.write(script);

JSON Data Encoding

const data = {
  message: 'escaped_message_here',
  user: 'escaped_user_here'
};
const jsonString = JSON.stringify(data);

Security Best Practices

While string escaping helps prevent XSS, always follow these security practices:

Use proper escaping contextually (HTML, JS, URL, CSS escaping are different)
Prefer textContent over innerHTML when possible
Use Content Security Policy (CSP) headers
Validate all user input on the server side
Consider using modern frameworks that handle escaping automatically