JSON Transformer

Overview

JSON Transformer is a tool for reshaping and filtering JSON data without writing code. Paste or fetch JSON, then apply transformations using either the visual point-and-click builder or raw jq expressions. The output updates in real time as you build your transformation.

Input Methods

• Paste — paste raw JSON into the input panel
• URL Fetch — enter a REST endpoint URL; JSON Transformer fetches the response
• File Upload — upload a .json file from your computer

Visual Builder

The visual builder lets you:

• Select fields — check the fields you want to keep; uncheck to remove
• Rename fields — click a field name to rename it in the output
• Filter array items — add conditions (field = value, field > number, etc.)
• Flatten nested objects — expand nested keys into flat fields

jq Mode

Switch to jq Mode to write raw jq expressions for maximum flexibility. Common jq examples:

• .users[] | select(.active == true) | {id, name} — filter active users
• [.items[].price] | add — sum all prices in an items array