Easily build and encode URL parameters. Add your key-value pairs below to generate a clean, safe, and valid query string for your API requests and web links.
Manually typing out long URLs with multiple parameters is not only tedious but also prone to errors. A single missing ampersand or an unencoded special character can cause an API request to fail or a webpage to load incorrectly. Our Query String Generator takes the guesswork out of the process by providing a structured interface to build your links.
Whether you are a developer testing endpoints or a marketer setting up tracking links, this tool ensures that every key-value pair is correctly formatted. If you're working with complex data structures, you might also find our JSON Formatter & Validator helpful for checking the payloads you send via these queries.
One of the most critical aspects of web requests is URL encoding. Characters like spaces, question marks, and symbols have reserved meanings in the HTTP protocol. If your parameter values contain these characters, they must be converted into a "percent-encoded" format. Our builder handles this automatically using standard browser APIs, similar to how our URL Encoder/Decoder works, ensuring your data remains intact during transmission.
Efficiency is key in modern development. Instead of wrestling with string concatenation in your IDE, use this tool to visualize and verify your parameters first. For those managing marketing campaigns, this tool pairs perfectly with our UTM Link Builder to ensure your tracking parameters are perfectly structured every time.
The question mark (?) is used to signal the start of the query string. The ampersand (&) is used to separate individual key-value pairs within that string. Our tool automatically places these in the correct positions.
Yes. You can create arrays by using the same key multiple times (e.g., color=red&color=blue) or by using bracket notation (e.g., color[]=red&color[]=blue) depending on how your backend is configured to parse them.
Absolutely. It is perfect for building GET request URLs for tools like Postman, cURL, or simply testing endpoints directly in your browser.