ToolsXpo

Query String Builder

Convert a JSON object into a fully encoded, web-ready URL query string.

This tool has an API.Automate it from your code — 1 credit/call.Open in Playground
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Examples & Use Cases

JSON Input

{ "search": "new york", "filters": ["hotels", "cheap"] }

Encoded Query String

search=new+york&filters=hotels&filters=cheap

JSON to Query String Builder

Manually encoding variables into a query string format is error-prone, especially when dealing with spaces, special characters, and arrays. Our Query String Builder takes a standard JSON object and compiles it into a perfectly encoded, standard-compliant URL parameter string.

Why Use a Query Builder?

  • Safe Encoding: The builder automatically applies `encodeURIComponent` to both keys and values, ensuring characters like `&` or `=` inside your data don't break the string.
  • Array Flattening: Standard JSON arrays (like `tags: ["a", "b"]`) are properly flattened into multiple query parameters (`tags=a&tags=b`) as expected by most REST APIs.
  • API Testing: Quickly mock up complex GET request payloads without writing custom stringification scripts in Postman or your terminal.

100% Privacy and Security

Your data is converted purely in your browser. We never log or intercept the API parameters you build. This makes it completely safe for generating strings that contain sensitive authentication tokens or database query filters.

About Query String Builder

Convert a JSON object into a fully encoded, web-ready URL query string. It's built for debugging web requests, headers and page behaviour, runs instantly, and works on any device — no install, no sign-up.

How to use Query String Builder

  1. Paste or type your input into the editor on the left.
  2. Leave the defaults, or tweak them if the tool exposes options.
  3. The result appears instantly on the right — everything runs in your browser, so nothing is uploaded.
  4. Copy the output, or download it, and you're done.

Why use Query String Builder?

  • Fast and local — the transform happens in your browser, so there's no round-trip and no waiting.
  • Private by default — your input never leaves your device.
  • Accurate — the same, well-tested logic powers both this page and the public API.
  • Free — unlimited use in the browser, with an optional API for automation.

Use it from the API

Everything this page does is also available as a REST endpoint, so you can call Query String Builder from your own code, a script or a CI pipeline.

Bash
curl "https://api.toolsxpo.com/v1/query-string-builder" \
  -H "Authorization: Bearer txp_live_YOUR_KEY"

The endpoint returns a JSON envelope ({ ok, data, meta }) and costs 1 credit per successful call. Try it in the playground or browse the full API reference.

Frequently asked questions

Is Query String Builder free to use? Yes — use it in the browser as much as you like. The optional API has a free tier and pay-as-you-go pricing for heavy or automated use.

Is my data private? Yes. Query String Builder runs entirely in your browser — your input never leaves your device and nothing is logged or stored.

Can I automate Query String Builder? Yes — call the query-string-builder API endpoint from any language and script it into your workflow.

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