Check out a suite for developing various products and materials in your system. Work with the options for formatting SON, decoding Base64, converting timestamps, and debugging JWT. Operate in an online or offline mode according to your project's requirements.
Downloading DevUtils 1.17 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. This Mac application was originally created by Tony Dinh. The software lies within Developer Tools, more precisely Webmaster Tools.
From the developer:
DevUtils.app is an offline toolbox for developers. The application lets you format JSON, decode Base64, convert timestamps, and debug JWT with just one click. DevUtils.app is a native macOS app that works entirely offline. Everything you paste into the app never leaves your machine.
You may want to check out more Mac applications, such as Multisite for iWeb, Validator-SAC or Abyss Web Server, which might be related to DevUtils.