JFPJSON Format Plus

URL Encoder and Decoder

Prepare query parameter values, redirect URLs, callback data, and API examples. Encoding follows `encodeURIComponent`, while decoding reports malformed percent escapes instead of silently changing them.

URL component processingLocal
Ready.

Data handling notes

  • Processing runs locally without sending the URL to a server.
  • The encoder is intended for URL components, not an entire URL with separators.
  • Invalid percent sequences produce an explicit decoding error.

FAQ

Should I encode a complete URL?Usually no. Encode individual parameter values so `:`, `/`, `?`, and `&` can keep their structural role.
Why can decoding fail?Incomplete percent escapes and invalid UTF-8 byte sequences are not valid encoded components.