What this URL tool does

The utility uses the platform’s encodeURI, encodeURIComponent, decodeURI and decodeURIComponent behavior to transform URLs or individual values without making a network request.

How to use it

• Choose Full URI for a complete URL or URI component for a single value.
• Enter text and select Encode or Decode.
• Use Swap to move output back into the input for another operation.
• Copy or download the result when it is ready.

Practical example

Input: hello world & tools
Component output: hello%20world%20%26%20tools

Full URI versus component encoding

Full URI encoding preserves structural characters such as colon, slash, question mark and ampersand. Component encoding escapes those separators because a component is treated as data rather than URL structure.

Common mistakes

• Encoding an already encoded value twice
• Using full-URI mode for an individual query value
• Decoding malformed percent sequences
• Assuming encoding validates that a destination exists

Methodology and limitations

Native JavaScript URL encoding APIs are standards-based and handle Unicode through UTF-8 percent sequences. This is a text transformer, not a URL parser, redirect checker or security scanner.