Polyfill.io

Polyfill.io is a service which makes web development less frustrating by selectively polyfill just what the browser needs. Polyfill.io reads the User-Agent header of each request and returns polyfill that are suitable for the requesting browser.

English | 中文 | 日本語 | Tiếng Việt | española | française | Português | বাংলা | Deutsch | हिंदी

We have transitioned to utilizing Cloudflare as our Content Delivery Network (CDN) provider. We apologize for any inconvenience that may have arisen during this migration period. Please rest assured that we will continue to offer the polyfill service at no cost.

Polyfill.io documentation is on the website.

Read our contributing guide to learn about our development process, how to propose bugfixes and improvements, and how to build and test your changes.

https://github.com/jakeChampion/polyfill-service-self-hosted/

Polyfill.io is licensed under the terms of the MIT license. Contributors must accept our contribution terms.