What this tool does
Choose the same mode used for encoding: URL Component for a single parameter value, or Full URL for a complete address with its necessary separators preserved. Invalid percent encoding produces an error.
- The input URL will not be navigated to, requested, or validated.
- Error UTF-8 percent sign sequences are not silently replaced.
- A + stays a plus sign; it is not automatically replaced with a space.
How to use it
- Paste percent-encoded text.
- Select the mode corresponding to the original encoding method.
- Click "URL Decode".
- View results or invalid encoding prompts.
Common uses
- Read the query parameters in the log.
- Recover encoding paths containing Chinese or Japanese characters.
- Troubleshoot incomplete % or incorrect UTF-8 sequences.
URL Decode Features
Decodes percent sign sequences and provides friendly errors if the encoding is incomplete or invalid. Review the result, then copy it for use.
FAQ
Why does entering a separate % result in an error?
The percent sign must be followed by two hexadecimal digits; incomplete sequences are not valid URL encodings.
Why doesn't the plus sign turn into a space?
This tool keeps + as a plus sign. For form-encoded text, replace each + that represents a space with %20 before decoding.
Will decoding access this URL?
No. Input is always treated as text only.