Does this work with JSON arrays?

Yes. When the root value is an array of objects, the picker applies the selected keys to every item in the array and returns the filtered array.

Are nested keys supported?

The picker targets top-level keys only. To extract a nested field, first pick the parent key, then run the result through the tool again.

What happens if a key does not exist in the JSON?

Missing keys are silently skipped. Only keys that actually exist in the source object are included in the output.

Is my JSON data sent to a server?

No. Everything runs entirely in your browser using JavaScript. Your JSON never leaves your machine.

How do I enter key names?

Type the key names separated by commas, for example: id, name, email. Leading and trailing spaces around each key are trimmed automatically.

JSON Key Picker

Paste a JSON object or array and pick exactly the keys you want to keep — get a clean filtered result in one click.

JSON Input

Keys to Keep

Click detected keys below, or type comma-separated names.

Filtered Result

Paste JSON and pick keys to see the result here.

Summary

JSON Key Picker lets you paste any JSON object or array and select exactly which top-level keys to keep. The filtered result is displayed immediately and can be copied with one click. All processing happens in your browser — no data leaves your machine.

How it works

Paste or type your JSON into the input panel on the left.
Enter the key names you want to keep, separated by commas.
The tool validates the JSON and extracts the matching keys.
The filtered JSON appears in the output panel on the right.
Click "Copy Result" to copy the output to your clipboard.

Use cases

Strip sensitive fields from an API response before sharing.
Reduce a large JSON payload to only the fields your app needs.
Quick-prototype a slimmer data shape during development.
Extract a consistent subset from each item in a JSON array.
Clean up debug output by hiding irrelevant keys.
Compare two objects by looking at the same subset of fields.

Frequently Asked Questions

Last updated: 2026-05-23 · Reviewed by Nham Vu