cf_dev

• Free Lmits

• Worker

  • py

  • js

Free Lmits

https://developers.cloudflare.com/workers/platform/limits/

• CPU time per HTTP request 10 ms

Worker

https://developers.cloudflare.com/workers/languages/

• JavaScript + TypeScript

• Python Workers

• Rust

py

https://developers.cloudflare.com/workers/languages/python/

• beta @ 2026 March

js

https://developers.cloudflare.com/workers/tutorials/build-a-qr-code-generator/

npm create cloudflare@latest -- qr-code-generator

npx wrangler deploy