Query String Builder
Build URL-encoded parameters from a JSON object.
Tool inputs stay in your browser · optional AI search sends your query
Good to know: Uses URLSearchParams encoding (spaces become +). Arrays produce repeated keys; null becomes an empty value. Does not attach parameters to or request a website.
How to use it (step by step)
- 1Type or paste your text into the “Input” box. There is already an example in it so you can see how it works; press Clear to start with your own.
- 2The answer appears right away in the “Result” box. No button needed.
- 3Press Copy and paste the result wherever you need it.
Words to know
- JSON
- A common text format apps use to store and send data, made of names and values in { } brackets.
- Array / list
- An ordered collection of items, like ["apple", "banana"]. Every programming language has one.
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