QUICK ANSWERStart with the tool that matches your immediate input.
Open CSV Delimiter Converter first when its stated purpose matches the result you need now. Use CSV to XLSX only when it solves a separate next task.
This guide is for writers, office teams, students, and data workers. Start with CSV Delimiter Converter when your immediate task is to convert your file or data with the CSV Delimiter Converter directly in your browser. Move to CSV to XLSX only when you also need to convert your file or data with the CSV to XLSX 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 CSV to XLSX solves a genuinely different next step.
Both tools sit in Documents & Files, but they handle different inputs or outcomes. Keeping those roles separate reduces repeated work and makes verification easier.