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Escape Sequence Converter - URL, HTML, Unicode, Hex Encoder

Escape Sequence Converter

Understanding Escape Sequences

Escape sequences are special character combinations used to represent characters that would otherwise be difficult or impossible to type or display. Different programming languages, protocols, and systems use different escape sequence formats. This tool helps you convert between the most common formats.

Supported Escape Formats

URL Encoding (Percent Encoding)

Used in URLs to encode special characters. Replaces unsafe ASCII characters with a "%" followed by two hexadecimal digits.

Original: Hello World! Encoded: Hello%20World%21 Original: user@example.com Encoded: user%40example.com

HTML Entity Encoding

Converts special HTML characters to named or numeric entities to prevent XSS attacks and display special characters correctly.

Original:
Hello & goodbye
Encoded: <div>Hello & goodbye</div> Original: © 2024 "Company" Encoded: © 2024 "Company"

Unicode Escape Sequences

Represents Unicode characters using escape sequences like \uXXXX. Common in JSON, JavaScript, and Python.

Original: Café Encoded: Caf\u00e9 Original: Hello 世界 Encoded: Hello \u4e16\u754c

Hexadecimal Encoding

Converts text to hexadecimal representation. Each character is represented by its hex value.

Original: Hello Encoded: 48656c6c6f Original: ABC Encoded: 414243

How to Use This Tool

  1. Enter Text: Paste or type the text you want to convert
  2. Select Conversion Type: Choose the type of encoding or decoding you need
  3. Convert: Click the convert button to see the result
  4. Copy Result: Use the copy button to copy the converted text

Common Use Cases

URL Encoding/Decoding

  • Encode query parameters in URLs
  • Decode URL parameters from server logs
  • Prepare form data for HTTP requests
  • Handle special characters in REST API URLs

HTML Entity Encoding/Decoding

  • Prevent Cross-Site Scripting (XSS) attacks
  • Display special characters in HTML (©, ®, ™, etc.)
  • Encode user input for safe HTML display
  • Parse HTML entities from scraped content

Unicode Escape Sequences

  • Work with JSON data containing special characters
  • Represent international characters in JavaScript
  • Debug Unicode issues in applications
  • Store Unicode data in ASCII-only systems

Hex Encoding/Decoding

  • Analyze binary data and network packets
  • Debug low-level protocol communications
  • Work with cryptographic functions
  • Inspect file contents and memory dumps

Quick Reference: Common Escape Characters

URL Encoding: Space → %20 & → %26 = → %3D ? → %3F # → %23 / → %2F : → %3A @ → %40 ! → %21 HTML Entities: < → < > → > & → & " → " ' → ' © → © ® → ® ™ → ™ € → € Unicode Escapes (Common): é → \u00e9 ñ → \u00f1 © → \u00a9 € → \u20ac ™ → \u2122 中 → \u4e2d

Security Best Practices

  • Always encode user input before displaying in HTML to prevent XSS attacks
  • Use proper encoding for the context (URL encoding for URLs, HTML entities for HTML)
  • Double-check decoded data from untrusted sources before using it
  • Validate input after decoding to ensure it meets expected format

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