Query String Parser

Parse a URL query string into JSON and convert JSON back into a query string.

Query string or URL

output

About this tool

Convert between a URL query string and a JSON object right in your browser, with repeated keys turned into arrays.

Can I paste a full URL?

Yes — paste a whole URL and only its query part (after the ?) is parsed into JSON.

How are repeated keys handled?

Keys that appear more than once become a JSON array of all their values.