Query String Builder

Build URL query strings from key-value pairs. Handles encoding automatically.

Runs entirely in your browser — nothing is uploaded or stored on any server.

About Query String Builder

Updated Jan 2025

The Query String Builder lets you construct URL query strings by entering key-value pairs. It automatically URL-encodes values, handles arrays (multiple values for one key), and shows the final URL in real time. Useful for building API request URLs, testing endpoints, and generating links.

Frequently Asked Questions

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