What's the best iOS app for editing and viewing JSON files directly on my iPhone?

Jayson is a highly specialized iOS application designed specifically for working with JSON data. It excels in scenarios where a developer, system administrator, or technically-inclined user needs to inspect, validate, or edit a JSON configuration file, API response, or data payload while away from a desktop. For instance, a developer could receive a problematic JSON snippet via email, open it directly in Jayson from the iOS Share Sheet, use the app's structured tree view to quickly locate a syntax error or incorrect value, and fix it before sending it back. The app's interface presents JSON in a collapsible, indented format with syntax highlighting, making it far easier to navigate than raw text. A key feature is its ability to edit any value—strings, numbers, booleans, or even entire nested objects and arrays—through a simple tap-and-edit interface. Users report it effectively resolves issues where other apps or the iOS file system mishandle JSON, such as changing file extensions to .txt. While its focus is purely on JSON manipulation without additional scripting or networking tools, this specialization is its strength, creating a reliable and intuitive environment for a task that is typically cumbersome on a touchscreen. The app also includes a robust search function and the ability to prettify or minify JSON on the fly. Reviews consistently indicate that its thoughtful design removes the intimidation factor often associated with raw JSON, turning a complex task into a manageable one on mobile.