Query Params Converter
Convert JSON objects to URL query strings or decode URL parameters to JSON. Perfect for APIs and debugging.
JSON Object
Query String
How to Convert Query Parameters
- Start with either a JSON object or a URL query string
- Paste valid JSON or query parameters in the input field
- Click "Convert" to transform to the other format
- Copy the result to use in URLs, API requests, or applications
Why Query Parameters Matter
API Development
Build APIs that accept both JSON bodies and query parameters from different clients.
URL Building
Programmatically construct URLs with the right query parameters for consistency.
Form Handling
Convert between form data and query strings for seamless data transmission.
Search Filters
Build search URLs with multiple filter parameters for complex queries.
Query Params Converter Features
Nested Objects
Handles nested objects with bracket notation: obj[key][subkey]=value for complex structures.
Array Support
Arrays are converted to indexed parameters: arr[0]=value1&arr[1]=value2.
Special Characters
Automatically handles URL encoding and decoding of special characters.
Bidirectional
Convert from JSON to query string or vice versa. Both directions work perfectly.
Frequently Asked Questions
What are URL query parameters?
Query parameters are key-value pairs in a URL after the question mark. Example: https://example.com?name=John&age=30
When should I use query parameters?
Use query parameters for passing data in URLs like search filters, pagination, sorting, or form submissions via GET requests.
Can I convert nested objects?
Yes, nested objects are converted to bracket notation: obj[key][subkey]=value. Arrays are converted to indexed notation.
How are special characters handled?
Special characters are automatically URL-encoded. Spaces become %20, & becomes %26, etc. The converter handles this automatically.
Is there a URL length limit?
Most browsers and servers limit URLs to 2,000-8,000 characters. For large data, use POST requests with form-encoded or JSON body instead.
How do I decode a query string?
Paste the query string and click "Convert to JSON". The tool automatically decodes URL-encoded characters and recreates the original object.
About Query Parameter Conversion
Converting between JSON objects and URL query parameters is essential for web development. It enables seamless integration between different data formats and transport mechanisms.
Common Applications:
- API Development: Build APIs that accept both JSON bodies and query parameters
- Debugging URLs: Quickly decode query strings to understand what data was passed
- URL Building: Programmatically construct URLs with the right query parameters
- Form Handling: Convert form data to query strings or vice versa
- Search Filters: Build search URLs with multiple filter parameters
- Analytics: Parse and generate tracking parameter strings
- Testing: Quickly generate test URLs with various parameter combinations
- Integration: Convert between different API formats for integration testing