The URL Encoder / Decoder is a free online tool that converts URLs to and from percent-encoded format. URLs can only contain a limited set of characters — special characters like spaces, ampersands, question marks and non-ASCII characters must be encoded as percent sequences (e.g. a space becomes %20, & becomes %26) to be safely transmitted over the internet.

This dual-mode tool handles both encoding and decoding, making it indispensable for web developers building APIs, constructing query strings and debugging URL-related issues.

How to Encode or Decode a URL

• Paste your URL or text in the input field
• Click Encode to convert special characters to percent-encoding
• Click Decode to convert percent-encoded sequences back to readable characters
• Copy the result

Characters That Need Encoding

• Space → %20 (or + in query strings)
• & → %26
• # → %23
• = → %3D
• / → %2F (when used as literal slash, not path separator)

Common Use Cases

• Encoding query string parameters before adding them to a URL
• Decoding URL-encoded API responses for readability
• Debugging redirect URLs that contain encoded parameters
• Processing form data submissions with special characters

Free, instant, no login required.