When Chrome opens a URL with a fragment id, it decodes %xx and applies isomorphic-decode [1] to it, then tries to find an element with the decoding result as an ID in some cases. No other browsers do this, and it's not defined by the standard. For example, if a user opens example.com/#%F8%C0, Chrome 1. searches the page for an element with id="%F8%C0" 2. If it’s not found, it searches the page for an element with id="øÀ" [1] https://infra.spec.whatwg.org/#isomorphic-decode


De-facto standard

Status in Chromium


Removed (tracking bug) in:

  • Chrome for desktop release 73
  • Chrome for Android release 73
  • Android WebView release 73

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.

  • Shipped/Shipping
  • Shipped/Shipping
  • Shipped/Shipping
  • No signals


Last updated on 2020-11-09