QUICK ANSWERStart with the tool that matches your immediate input.
Open Empty Link Checker first when its stated purpose matches the result you need now. Use WCAG Contrast Ratio Calculator only when it solves a separate next task.
This guide is for designers, developers, editors, and site owners. Start with Empty Link Checker when your immediate task is to check common empty link issues and receive practical improvement guidance. Move to WCAG Contrast Ratio Calculator only when you also need to check common wcag contrast ratio issues and receive practical improvement guidance.
The goal is not to run two tools automatically. It is to finish the first narrow task, inspect its result, and then decide whether WCAG Contrast Ratio Calculator solves a genuinely different next step.
Both tools sit in Accessibility Tools, but they handle different inputs or outcomes. Keeping those roles separate reduces repeated work and makes verification easier.