Query string parser & builder

Paste a URL or ?query. Edit params as a table. Copy query or full URL. Nothing is uploaded.

URL / query Input URL or query string

key	value

Ready

How it works

Query strings are the ? part of a URL. Keys and values are application/x-www-form-urlencoded (spaces as + or %20).

This tool uses the browser URL and URLSearchParams APIs so encoding matches what your browser does. Repeated keys become multiple rows.

If the input has no scheme, a temporary https://_ base is used only for parsing — not sent anywhere.

https://api.example.com/v1?limit=10&sort=name

?q=hello%20world&lang=en

# repeated keys
?tag=a&tag=b

Hash (#fragment)? Fragments are not query params. This tool ignores #… when building the query.

Plus vs %20? URLSearchParams treats + as space when parsing form-style queries.

Empty values? Allowed: flag= keeps an empty string value.

Arrays? No special nested array syntax — repeat the key or use your API’s own convention.

Uploaded? No.