URL Encoder
Encode URLs and text with file upload support.
URL encoding, also known as percent encoding, is a mechanism for encoding information in a Uniform Resource Identifier (URI). It's used to represent characters that have special meaning in URLs or characters that aren't allowed in URLs.
URL encoding converts special characters into a percent sign followed by two hexadecimal digits. For example, a space character is encoded as %20, and the at symbol is encoded as %40. This ensures URLs are valid and can be transmitted correctly over the internet.
Our URL encoder handles all standard URL encoding rules, making it easy to safely encode URLs and URL components.
URL encoding follows these rules:
- Character Identification: Identifies characters that need encoding (reserved, unsafe, or non-ASCII)
- ASCII Conversion: Converts the character to its ASCII code value
- Hexadecimal Conversion: Converts the ASCII code to hexadecimal representation
- Percent Encoding: Prepends a percent sign to create the encoded representation (e.g., space becomes %20)
- UTF-8 Encoding: For non-ASCII characters, first converts to UTF-8 bytes, then encodes each byte
Decoding reverses this process, converting percent-encoded sequences back to their original characters. All processing happens in your browser - your URLs never leave your device.
Query Parameters
Encode values in URL query strings to handle special characters, spaces, and non-ASCII text. Essential for passing data through URLs correctly.
Form Data
HTML forms use URL encoding (application/x-www-form-urlencoded) to submit data. Understanding encoding helps debug form submission issues.
API Requests
REST APIs often require URL-encoded parameters. Proper encoding ensures API requests work correctly and handle special characters.
International URLs
URLs containing non-ASCII characters (like Chinese, Arabic, or accented characters) must be encoded to be valid and functional.