Add Simple and Calculated Fields to JSON Data Online
Use our free online tool to add simple and calculated fields to your JSON data quickly
Add Fields
This tool makes it simple to add new columns to your JSON file. You can create fields with fixed values, empty placeholders, or even dynamic content using formulas and other data in your file. It’s useful for when you need to enrich your data, add missing fields before importing into another system, or prepare your file for further processing. Whether you're working with customer lists, inventory spreadsheets, or survey results, this tool gives you full control over how and where to insert new columns.
JSON
JSON (JavaScript Object Notation) is a lightweight, text-based format used for data interchange. JSON is easy to read and write for humans and simple to parse and generate for machines. Its structure is composed of two elements: objects, containing key-value pairs, and arrays, holding lists of values. Keys in JSON objects are strings, and values can be strings, numbers, arrays, true or false, null, and other objects. This format is widely used in web applications for sending data between clients and servers, as well as in configuration files and data feeds.