DiffFlow
Free Developer Tools

Monitoring Utilities

Inspect DOM elements and generate resilient CSS selectors directly in your browser.

CSS Selector Tester

Fetch live HTML, visually click any element in a sandboxed iframe, and extract the shortest unique CSS selector for your monitor.

Open selector tool

Visual Element Picker

Interactive point-and-click overlay integrated directly with the CSS Selector Tester engine.

Launch visual tool

Ready to track changes? Paste any generated selector into a free DiffFlow account to receive instant alerts when that element updates.

Stop missing the signal.

Create your first monitor