URL Encode Decode
Input is detected automatically: plain text is encoded and valid percent-encoded text is decoded. You can also choose encode or decode manually.
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URL encoding and decoding: uses and scope
URL encoding represents special characters as percent-encoded sequences for query parameter values, path segments and inspecting escaped text in logs.
When automatic mode fails to decode, the input will be treated as plain text. Manual decoding requires valid percent-encoding and UTF-8 sequences.
Capabilities explained
Parameter values differ from whole URLs
Encoding processes characters like slashes, question marks, and equal signs; First, it is essential to determine whether the content to be encoded is a parameter value or a URL fragment; the encoded result should not be treated as a complete URL for structural rewriting.
Percent decoding and plus signs
Decoding reads valid percent-encoded UTF-8 sequences and preserves literal plus signs. This differs from form-encoding rules that treat + as a space.
Practical examples
Encode text containing a space
Input
hello world
Conversion Result
hello%20world
This illustrates percent-encoding a space for a parameter value or path segment.
Decode a plus character
Input
a%2Bb
Conversion Result
a+b
Decoding %2B produces a plus sign. A literal plus in a+b is not automatically converted to a space.
Usage Steps
Paste text or link
Enter original text, query parameters, or already-encoded URL fragments.
Auto Detect
Input is detected automatically: plain text is encoded and valid percent-encoded text is decoded. You can also choose encode or decode manually.
Copy to Continue
After confirming the results, use one-click copy to interface debugging, log troubleshooting, or page links to continue using.
Frequently Asked Questions
Why is the decoded result sometimes empty?
Invalid input in manual decode mode clears the results and shows an error. Automatic mode encodes it as plain text; switch modes when the input is ambiguous.
When should you prioritize using the encoding result?
When text needs to be placed in URL query parameters, path segments, callback addresses, or link fields in logs, encoding first prevents special characters from breaking the structure.
Why is a plus sign not decoded as a space?
This tool follows the encoding and decoding rules for URL text, where a plain + remains as +; Spaces are represented as %20. To process form data, use the appropriate form parsing rules.