JSON Field Extractor

Tool Guide

About the Online JSON Field Extraction Tool

The online JSON field extraction tool is a web-based JSON structure processing tool that supports quickly extracting specified fields and generating new JSON content.

This tool can automatically parse the pasted JSON data and recognize first-level fields. Users only need to check the field names they want to extract, and the system automatically generates new JSON containing only the selected fields, saving the trouble of manually writing processing code.

The tool is suitable for front-end/back-end API debugging, data field filtering, API data trimming, log processing, and many other development and data analysis scenarios. It works online—paste and use, with no registration or installation needed.

How to Use the Online JSON Field Extraction Tool

Step 1: Paste the original JSON content—paste the JSON text to be processed into the input box.

Step 2: Select fields—the tool will automatically recognize the first-level fields and display a field list. Check the field names you want to extract.

Step 3: Get the new JSON—the system generates new JSON containing only the selected fields in real time, which you can copy and use directly.

Usage tip: The current version extracts only first-level fields by default. It will support expanding and filtering fields of multi-level nested structures in the future.

JSON Field Extraction Tool FAQ

Does it support extracting fields from nested JSON?

Currently it only supports extracting the first-level fields of JSON. It will support the field expansion and selection feature for nested structures in the future.

Will the tool save my JSON data?

No. All operations are completed locally in the browser—no user data is uploaded or stored, ensuring data privacy and security.

Can I export the extracted JSON file?

No. The extraction result only supports direct copying.

Will it prompt if the JSON format is invalid?

Yes, there will be a prompt. The tool has basic JSON format validation, and if the pasted content is in an invalid format, it will automatically prompt you to make corrections.

Does it support mobile use?

It supports access and use on mobile, but we recommend operating on a computer along with copy-paste and field selection for a better experience.