QUICK ANSWERStart with the tool that matches your immediate input.
Open AVI to MP4 Converter first when its stated purpose matches the result you need now. Use MP4 to MP3 Converter only when it solves a separate next task.
This guide is for creators, teachers, editors, and social teams. Start with AVI to MP4 Converter when your immediate task is to convert your file or data with the AVI to MP4 Converter directly in your browser. Move to MP4 to MP3 Converter only when you also need to convert your file or data with the MP4 to MP3 Converter directly 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 MP4 to MP3 Converter solves a genuinely different next step.
Both tools sit in Video Tools, but they handle different inputs or outcomes. Keeping those roles separate reduces repeated work and makes verification easier.