How it works
Decode exactly once
Percent escapes are decoded once using UTF-8. A plus sign remains a plus sign; this is not form-urlencoded conversion. Malformed escapes or invalid UTF-8 produce an error.
Double-decoding can change the meaning of data. Review the result as text before using it elsewhere. The tool never follows decoded addresses.
What happens to your input?
This tool does its work on this page. The site does not submit your entries or results or keep a history. However, any script allowed to run on the page could read its fields. Clearing the tool or leaving the page cannot erase clipboard entries, downloads, printouts, or screenshots. It also cannot protect you if your browser or device is compromised. Read the privacy limits.