## Data Encoding Formats Data must be properly encoded to traverse HTTP protocols, mail servers, and database fields without losing formatting or raising syntax errors. ### URL Percent Encoding URLs can only transfer safe characters (ASCII letters, digits, and a few symbols). Spaces must be converted to `%` codes (like `%20`), and symbols like slashes or ampersands must be encoded to avoid breaking path and query string structures. ### Base64 Binary-to-Text Encoding Base64 encodes binary data into 64 safe ASCII characters. It is commonly used to: - Embed tiny images directly inside CSS or HTML codes. - Transmit auth headers securely. - Prevent mail systems from breaking binary attachments. Both URL and Base64 translations happen instantly inside client-side modules, avoiding round-trip requests.