🔐 String Encoder/Decoder

Understanding String Encoding

String encoding converts text characters into a different format for safe storage, transmission, or display. Different encoding systems exist because different contexts have different rules about which characters are "safe."

Encoding Types Explained

HTML Entities: Converts special characters into HTML-safe codes. For example, < becomes < and & becomes &. Essential for preventing XSS (cross-site scripting) attacks and displaying code in web pages.

URL Encoding (Percent Encoding): Converts characters that aren't allowed in URLs into %XX format. Spaces become %20, special characters like ? and & get encoded so they aren't misinterpreted as URL syntax.

Base64: Converts any data (text or binary) into a string of 64 safe ASCII characters. Used for embedding images in CSS, JWT tokens, email attachments, and API data transfer.

Unicode Escapes: Represents characters using their Unicode code point in \uXXXX format. Used in JavaScript, JSON, and other programming contexts where non-ASCII characters need a safe text representation.

When to Use Each

• HTML entities: When inserting user-generated content into HTML pages safely.
• URL encoding: When building URLs with query parameters that contain special characters.
• Base64: When embedding binary data in text formats, or working with JWT tokens and APIs.
• Unicode escapes: When you need to represent non-Latin characters in ASCII-only source code.