About
Decode query parameters from URLs and build query strings from key-value input.
Parsing mode
Parsing mode reads a full URL or raw query string and outputs structured JSON, including repeated keys as arrays.
Builder mode
Builder mode accepts one key=value pair per line and generates a properly encoded query string that can be reused in links and requests.
Why this is useful
This utility helps when debugging redirects, API links, analytics parameters, and dynamic route generation in frontend applications.