Paste one component value
Do not paste a complete URL unless every delimiter is intentionally data inside one component.
Private URL component encoder and decoder
See exactly what every percent escape means
URLCodec handles one value, not an entire URL. Select RFC 3986 or form behavior before transforming; malformed escapes and invalid UTF-8 fail explicitly, while valid noncanonical input gets one reproducible canonical spelling.
RFC 3986 + form · strict UTF-8 · local only
Three explicit steps
Choose, transform, inspect
Name the receiving profile
RFC 3986 writes spaces as %20; form encoding writes spaces as + and protects a literal plus as %2B.
Inspect bytes and round trip
The result, byte rows, canonical spelling and opposite operation come from the same local domain service.
Ordinary web-data tasks
Useful when one value crosses a URL boundary
- Prepare a query-field value without treating & or = as structure.
- Read one encoded field copied from a log or test fixture.
- Explain why one Unicode scalar produces several %HH escapes.
- Compare RFC space handling with an HTML form component.
One component · no upload
Encode one value under a named profile
Choose RFC 3986 or HTML form rules, transform locally, and inspect the UTF-8 bytes plus canonical round trip.