jq Playground - JSON Query & Transformation Tool
Test and run jq expressions directly in your browser with our free jq Playground. Process JSON data, transform structures, and query nested objects without installing anything. Perfect for learning jq syntax, debugging JSON APIs, and data transformation tasks. All processing happens securely in your browser - your data never leaves your device. Features syntax highlighting, real-time processing, sample data, and comprehensive examples for beginners and experts alike.
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Why Use Our jq Playground?
Browser-Based Processing
Process JSON with jq directly in your browser - no installation required. All computations happen locally on your device for maximum speed and security.
Privacy Focused
Your JSON data never leaves your device. All processing happens client-side, ensuring complete privacy and security for your sensitive information.
Developer Friendly
Perfect for learning jq, debugging APIs, and processing JSON data. Features syntax highlighting, real-time results, and comprehensive error reporting.
Completely Free
No signup, no limitations, no ads. Use our jq playground as much as you need for personal or commercial projects without any restrictions.
How to Use the jq Playground
Paste Your JSON
Copy and paste your JSON data into the input editor, or click the "Sample" button to load example data and see how jq works. You can also use the "Complex" button to load advanced sample data for testing more sophisticated expressions.
Write jq Expression
Enter your jq filter in the expression editor. Start with simple expressions like .key or .[0] and build up to complex transformations. Use the quick examples panel to try common patterns or experiment with the provided sample data.
View Results
See the results of your jq expression in real-time. Errors are highlighted with clear messages to help you debug your expressions. The output panel shows formatted JSON that you can copy or download.
Copy or Save
Copy the results to your clipboard with one click, or save the expression and JSON data as a bookmark to return to later. You can also download the output as a JSON file for further processing.
jq Expression Examples
Basic Operations
.- Identity (return input as-is).key- Access object property.[0]- Access first array element.[]- Iterate over array elements
Advanced Operations
keys- Get object keyslength- Get array/object lengthmap(.name)- Transform array elementsselect(.age > 25)- Filter elements
Practical Use Cases
API Response Processing
Extract specific fields from JSON API responses for testing and debugging.
Data Transformation
Convert JSON data between different formats and structures.
Configuration Management
Process and validate configuration files in JSON format.
Ready to Get Started?
Choose from our suite of JSON tools to start processing your data right away.
JSON Path Finder
Navigate and query JSON structures with JSONPath expressions.
JSON Filter
Extract specific data from JSON with advanced filtering rules.
JSON Editor
Edit JSON with tree view, real-time validation, and statistics.
JSON Visualizer
Visualize JSON data as interactive graphs and tree structures.
JSON Formatter
Beautify and format JSON with syntax highlighting and customizable indentation.
API Tester
Test REST APIs with custom headers and request bodies.
Frequently Asked Questions
What is jq and how does this playground work?
jq is a lightweight and flexible command-line JSON processor. Our jq Playground allows you to test jq expressions directly in your browser without installing anything. Simply paste your JSON data, write a jq filter, and see the results instantly. The tool processes everything client-side, ensuring your data never leaves your device.
Is the jq Playground free to use?
Yes, our jq Playground is completely free to use with no limitations. You can process as much JSON data as you need without any signup or payment requirements. All processing happens in your browser, ensuring your data privacy and security.
Can I use the jq Playground for large files?
Absolutely! Our jq Playground is optimized to handle large JSON files efficiently. Whether you're working with small configuration files or large API responses, the tool will process your jq expressions quickly. For very large files, processing might take a moment but will complete successfully.
Is my data secure when using the jq Playground?
Yes, your data is completely secure. Our jq Playground performs all operations directly in your browser - no data is ever sent to our servers. This client-side processing ensures maximum privacy and security for your sensitive information. You can confidently process JSON data without worrying about data leaks or privacy concerns.
What jq features are supported in this playground?
Our jq Playground supports most common jq features including basic filters (.key, .[index]), object and array operations, pipes (|), functions (map, select, keys, length), conditionals (if-then-else), and mathematical operations. We're continuously updating to support more advanced features.
Can I save or export my jq expressions?
Yes, you can easily copy your jq expressions and results to your clipboard with a single click. While we don't currently offer direct file downloads, you can copy the output and save it to a file using your preferred text editor. You can also bookmark the page with your JSON data and expression to return to it later.
How can I learn jq expressions?
Our jq Playground includes a comprehensive set of examples to help you learn. Start with simple expressions like '.' (identity) and '.key' (object property access), then progress to more complex operations like 'map(.name)' (transform arrays) and 'select(.age > 25)' (filter elements). The quick examples panel provides instant access to common patterns, and you can experiment with both simple and complex sample data.
What are some practical use cases for jq?
jq is incredibly useful for API development and testing, data analysis and transformation, configuration file processing, log file parsing, and JSON data validation. Developers use it to extract specific fields from API responses, transform data between formats, filter large datasets, and automate JSON processing tasks. It's especially powerful for working with REST APIs, where you often need to extract and manipulate specific parts of JSON responses.