What is Base64 and URL Encoding?

Base64 encoding is a binary-to-text scheme that represents binary data in an ASCII string format. It is primarily used to transfer data over mediums designed to handle text, ensuring data integrity. This includes embedding small images in CSS or HTML without external file requests, or transferring complex parameters in email or HTTP headers. The output string is typically 33% longer than the input text. If you are specifically focused on this format, check our dedicated Base64 Encoder/Decoder.

URL encoding (also known as **Percent Encoding**) is required to create valid Uniform Resource Locators (URLs). It converts characters that are reserved (like `&` and `=`) or non-ASCII characters (like spaces and accents) into a safe, three-character format using a percent sign (`%`) followed by two hexadecimal digits (e.g., a space becomes `%20`). This is crucial for transmitting data correctly via web browsers and servers.

Typical Use Cases

• Web Developers: For debugging API requests, handling JWT (Base64), and ensuring query string data is properly formatted.
• System Administrators: For decoding log files and configuration data.
• SEO Specialists: For quickly cleaning up or analyzing complex URL parameters in landing page links.