馃攲 URL Encode / Decode
Free online URL encoder and decoder. Convert text to URL-encoded format and decode URL-encoded strings back to plain text. UTF-8 safe with no garbled characters. All processing happens locally in your browser.
What is URL Encoding?
URL encoding (Percent-encoding) is a mechanism for encoding information in a Uniform Resource Identifier (URI) under certain circumstances. It converts special characters and non-ASCII characters into a percent-sign (%) followed by two hexadecimal digits representing the character's byte value. This ensures that data can be safely transmitted over HTTP without breaking the URL structure.
This tool uses the browser's built-in encodeURIComponent and decodeURIComponent APIs for UTF-8-safe encoding and decoding. All processing happens locally in your browser 鈥?your data never leaves your device.
Common Use Cases
- GET Request Parameters 鈥?Encode query parameters to safely transmit special characters and non-ASCII text
- POST Form Data 鈥?application/x-www-form-urlencoded format requires URL encoding
- AJAX / Fetch Requests 鈥?Build safe API request URLs with encoded parameters
- URL Redirects 鈥?Encode destination URLs within redirect URLs
- Cookie Value Encoding 鈥?Encode special characters for safe cookie storage
Important Note
Unlike encodeURI, encodeURIComponent encodes all non-alphanumeric characters including those that are legally part of a URL structure (such as : // ? # &). This tool uses encodeURIComponent / decodeURIComponent, which is the correct choice for encoding query parameter values. Use encodeURI only when you need to encode a complete URL without breaking its structure.