Stephen Dolan's

JQ

Ever wanted to quickly find, extract or modify data coming from some JSON documents on the command line? JQ is the tool you’re looking for. I use it every time I need to transform, modify or extract some properties from an API’s response or analyze OpenAPI specification JSON files during my API reviews.

JQ is like sed for JSON data - you can use it to slice and filter and map and transform structured data with the same ease that sed, awk, grep and friends let you play with text.

JQ Website

JQ Github Repository

Taking advantage of OpenAPI for API Design reviews

By Arnaud Lauret, September 28, 2021

After my first recorded live demo session, here comes my first non recorded actually live session in which I show how I take advantage of the OpenAPI Specification during API design reviews. Note that I experienced some technical issues during this session, you’ll find the story in my “Barely surviving my first live (non recorded) demo session” post.

JQ and OpenAPI Series - Part 4

Bonus: Coloring JQ's raw output

By Arnaud Lauret, July 6, 2020

Ever wanted to quickly find, extract or modify data coming from some JSON documents on the command line? JQ is the tool you’re looking for. The three previous parts of this JQ and OpenAPI Series, taught us to extract data from JSON (OpenAPI) files and modify them using many filters, creating modules and using command line arguments. To finish this series, we’ll learn to color JQ’s raw terminal output and do a colored version of part 2’s search operations.

JQ and OpenAPI Series - Part 3

Modifying OpenAPI files with JQ

By Arnaud Lauret, June 28, 2020

Ever wanted to quickly find, extract or modify data coming from some JSON documents on the command line? JQ is the tool you’re looking for. Thanks to the two previous parts of this JQ and OpenAPI Series, we learned how to extract data from JSON (OpenAPI) files by discovering many filters, creating modules and using command line arguments. Now we will discover how to modify them; how to replace, add or delete elements in processed documents.

JQ and OpenAPI Series - Part 2

Using JQ command line arguments, functions and modules

By Arnaud Lauret, February 3, 2020

Ever wanted to quickly find, extract or modify data coming from some JSON documents on the command line? JQ is the tool you’re looking for. In the previous part of this JQ and OpenAPI Series, we learned to invoke JQ and how to extract data from JSON documents using some of its many filters. Now we will discover how to build flexible and easily reusable JQ filters by creating functions and modules and also using command line arguments.

JQ and OpenAPI Series - Part 1

Using JQ to extract data from OpenAPI files

By Arnaud Lauret, January 15, 2020

Ever wanted to quickly find, extract or modify data coming from some JSON documents on the command line? JQ is the tool you’re looking for. In this 4 parts post series, you’ll discover why and how I use JQ with OpenAPI Specification files. But more important, you’ll get some basic and more advanced example of how to use JQ on any JSON document to get and modify JSON data as you want. In this first part we’ll focus on what is JQ, why I use it with OpenAPI files and we’ll learn how to invoke JQ and discover some of the many JQ filters that can be used to extract data from JSON.