QUICK ANSWERStart with the tool that matches your immediate input.
Open Base64 Image Encoder first when its stated purpose matches the result you need now. Use JSON Diff Viewer only when it solves a separate next task.
This guide is for developers, analysts, testers, and technical writers. Start with Base64 Image Encoder when your immediate task is to use the Base64 Image Encoder to inspect, transform, validate, or generate developer data locally in your browser. Move to JSON Diff Viewer only when you also need to use the JSON Diff Viewer to inspect, transform, validate, or generate developer data locally in your browser.
The goal is not to run two tools automatically. It is to finish the first narrow task, inspect its result, and then decide whether JSON Diff Viewer solves a genuinely different next step.
Both tools sit in Developer & Data, but they handle different inputs or outcomes. Keeping those roles separate reduces repeated work and makes verification easier.