JSON to URL Query Converter
Convert JSON objects into URL query strings, API query parameters, full URLs, and readable parameter reports. Decode query strings back into JSON locally in your browser.
Paste a JSON object to turn into query parameters, or paste a query string to decode it back into JSON.
Query Settings
Options
These options help match query-string behavior used by APIs, browsers, backend frameworks, and request tools.
Converting JSON Objects Into Query Parameters
Many APIs use query strings for filters, search terms, pagination, sorting, and small request options. When those values start as a JSON object, manually writing the query string can lead to missed encoding, inconsistent array styles, or confusing nested keys.
This converter turns JSON objects into URL query strings, full URLs, Markdown reports, CSV summaries, or decoded JSON. It is useful for API examples, frontend routing, request debugging, and documentation.
When This JSON to URL Query Converter Helps
Creating query strings from search, filter, sort, and pagination objects used by frontend apps or APIs.
Comparing dot paths, bracket paths, repeated keys, and indexed keys before documenting an endpoint.
Decoding copied query strings into JSON so they are easier to inspect and edit.
Checking encoded values before pasting URLs into examples, docs, tests, or issue reports.
How to Use the JSON to URL Query Converter
- Paste a JSON object or query string into the input box.
- Choose whether to convert JSON to query, decode a query string, or inspect parameters.
- Select how nested keys, arrays, booleans, and null values should be handled.
- Choose query string, full URL, JSON, Markdown, CSV, or checklist output.
- Review the parameter preview and copy the generated output.
Example Query String Output
q=json%20tools&category=JSON%20%26%20Data&page=1&filters.status=live&tags=api&tags=debugging
Query String Styles Depend on the Backend
There is no single universal format for nested query parameters. Some APIs expect dot paths, some expect brackets, and some expect repeated keys for arrays. Use the style your backend or API documentation expects, especially when converting nested filters and arrays.
Frequently Asked Questions
What does this JSON to query converter do?
It converts JSON object keys into URL query parameters and can also decode a query string back into JSON-style output.
Can this handle nested JSON objects?
Yes. Nested objects can be represented with dot paths, bracket paths, repeated parent keys, or indexed paths depending on the selected setting.
How are arrays converted into query parameters?
Arrays can use repeated keys, comma-separated values, bracket keys, indexed bracket keys, or JSON text. The right choice depends on the API.
Is this different from a URL encoder?
Yes. A URL encoder focuses on escaping text. This tool turns structured JSON keys and values into query parameters and can inspect them as rows.
Is anything uploaded while converting query data?
No. The conversion runs entirely inside your browser.