DevTools
When running your Worker locally using the Wrangler CLI ↗ (wrangler dev) or using Vite ↗ with the Cloudflare Vite plugin ↗, you automatically have access to Cloudflare's implementation ↗ of Chrome DevTools ↗.
You can use Chrome DevTools to:
- View logs directly in the Chrome console
- Debug code by setting breakpoints
- Profile CPU usage
- Observe memory usage and debug memory leaks in your code that can cause out-of-memory (OOM) errors
- Run your Worker locally, by running
wrangler dev - Press the
Dkey from your terminal to open DevTools in a browser tab
- Run your Worker locally by running
vite - In a new Chrome tab, open the debug URL that shows in your console (for example,
http://localhost:5173/__debug)
Both the Cloudflare dashboard ↗ and the Worker's Playground ↗ include DevTools in the UI.
- Local development - Develop your Workers and connected resources locally via Wrangler and workerd, for a fast, accurate feedback loop.
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