Developer•Free tool
Query String Builder – URL Parameter Encoder
Build and encode URL query strings from key-value pairs. Add parameters, set the encoding and copy the ready URL.
No sign-upBrowser-based
DEV
Tool
Enter your values and get results instantly.
HOW
How to Use
- 1Add parameter keys and values\n2. The query string builds automatically\n3. Optionally add a base URL\n4. Copy the result
WIN
Benefits
Easy key-value input
Automatic URL encoding
Base URL support
Copy with one click
Private — runs locally
FAQ
Frequently Asked Questions
What is a query string?
It is the part of a URL after the ? that passes parameters to a page, like ?utm_source=twitter&id=42.
Are values URL-encoded?
Yes, special characters and spaces are encoded automatically so the URL works correctly.
Can I build UTM links?
Yes — add utm_source, utm_medium and utm_campaign keys to generate clean campaign tracking links.