URL Builder | A free, easy online tool

Your URL

Query parameters

Built URL

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How it Works

Set a base URL at the top, then add as many key / value rows as you need. The tool URL-encodes each value correctly and rebuilds the full URL beneath. Paste a URL that already has parameters and the rows auto-fill — perfect for editing existing campaign or tracking links.

Features

Seed from any URL: Paste a URL with query parameters and the editor pre-fills.
Add and remove rows: Build up the parameter list one pair at a time.
Proper encoding: Spaces, accents, and symbols are escaped using URLSearchParams.
Repeated keys: Add the same key multiple times to produce ?tag=a&tag=b.

Common Use Cases

Tracking links: Compose UTM-tagged or partner links for campaigns.
API testing: Build query strings for ad-hoc curl or browser requests.
Editing existing URLs: Paste, tweak a value, copy back out.
Sharable links: Encode multiple filters or settings into a single URL.

Privacy and Security

The URL is built locally in your browser. Nothing is sent to a server, logged, or stored.

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