JSON Modifier

Selectively filter keys from a JSON object.

Runs in your browser — your data never leaves your device

Input JSON

0 characters

Modified JSON

Key Filter

Paste a valid JSON object or array to see available keys.

Modify JSON data by selecting or deselecting individual keys with our JSON key editor. Quickly filter large JSON objects to extract only the fields you need, ideal for API responses and data transformation tasks.

How to Modify JSON

Paste your JSON object or array into the input panel. The tool automatically detects all keys and displays them as checkboxes in the Key Filter panel. Toggle checkboxes to include or exclude specific keys from the output. The modified JSON updates in real time as you make selections. Use the search field to quickly find specific keys in large objects, or use Select All / Deselect All for bulk operations.

Common Use Cases

This tool is particularly useful when working with API responses that contain more data than you need. Instead of writing code to pluck specific fields, you can visually select the keys you want and copy the resulting subset. It is also helpful for debugging nested JSON structures, preparing data for documentation, or creating simplified versions of complex objects for testing purposes.

Frequently Asked Questions

What is a JSON modifier?

A JSON modifier lets you filter, select, or remove specific keys from JSON objects, making it easy to reshape data without writing code.

How do I use the JSON modifier?

Paste your JSON data, then use the interface to select which keys to keep or remove. The tool outputs the modified JSON with only the selected keys.

Can I filter nested JSON objects?

Yes, the tool handles nested JSON structures, allowing you to select or remove keys at any depth level while preserving the overall structure.

Is this tool free?

Yes, ToolDock's JSON modifier is completely free, requires no signup, and runs entirely in your browser.

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How to Modify JSON

Common Use Cases

Frequently Asked Questions

What is a JSON modifier?

How do I use the JSON modifier?

Can I filter nested JSON objects?

Is this tool free?

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How to Modify JSON

Common Use Cases