What's the difference between origin, host, and hostname?

Hostname is just the domain (example.com). Host is the domain plus a non-default port (example.com:8443). Origin is the scheme, host, and port together (https://example.com:8443) — it's the value browsers use to decide whether two pages can talk to each other under the same-origin policy.

Why does my URL show as invalid?

The parser requires a complete, absolute URL with a scheme — https://example.com/path works, but example.com/path or //example.com/path (a protocol-relative URL) will be rejected, because the browser's URL constructor can't resolve them without a base URL to resolve against.

Does this decode percent-encoded characters in the query string?

Yes — each query parameter's value is decoded automatically, so %20 becomes a space and %3D becomes an equals sign, matching exactly what your browser or server would receive after decoding the request.

Is the URL I paste sent anywhere?

No. Parsing happens with the browser's built-in URL class entirely on your device — nothing is sent to a server, which matters if the URL contains a session token, API key, or other sensitive query parameter.

URL PARSER

Break any URL into its protocol, host, port, path, query parameters, and hash, with every parameter laid out in a clean table.

URL

Protocol	https:
Hostname	www.example.com
Port	8443
Origin	https://www.example.com:8443
Path	/blog/post
Query string	?utm_source=newsletter&page=2
Hash	#comments
Username	user
Password	pass

Query parameters (2)

utm_source	newsletter
page	2

How to parse a URL

1
Paste a full URL, including its scheme (https://).
2
The parser splits it into protocol, host, port, path, query string, and hash using the browser's own URL engine.
3
Every query parameter is listed separately in a key/value table, so you can read a long tracking URL at a glance.

Questions

What's the difference between origin, host, and hostname?: Hostname is just the domain (example.com). Host is the domain plus a non-default port (example.com:8443). Origin is the scheme, host, and port together (https://example.com:8443) — it's the value browsers use to decide whether two pages can talk to each other under the same-origin policy.
Why does my URL show as invalid?: The parser requires a complete, absolute URL with a scheme — https://example.com/path works, but example.com/path or //example.com/path (a protocol-relative URL) will be rejected, because the browser's URL constructor can't resolve them without a base URL to resolve against.
Does this decode percent-encoded characters in the query string?: Yes — each query parameter's value is decoded automatically, so %20 becomes a space and %3D becomes an equals sign, matching exactly what your browser or server would receive after decoding the request.
Is the URL I paste sent anywhere?: No. Parsing happens with the browser's built-in URL class entirely on your device — nothing is sent to a server, which matters if the URL contains a session token, API key, or other sensitive query parameter.