Characters before @ in a URL constructor host

Tests which characters are accepted within URL hostnames that return the first part of the URL when separated by @.

Shazzer Master

Created Jun 22, 2026

Updated Jun 22, 2026

Unable to render tweet button

Detecting browser...

CategoryURL Handling

VisibilityPublic

TypeJS

CharsetUTF-8

Template used:

new URL("https://example1.com"+String.fromCodePoint($[i])+"@example2.com").host === "example1.com" && log($[i])

Sample payloads

new URL("https://example1.com"+String.fromCodePoint(35)+"@example2.com").host === "example1.com" && alert(35)

new URL("https://example1.com"+String.fromCodePoint(47)+"@example2.com").host === "example1.com" && alert(47)

new URL("https://example1.com"+String.fromCodePoint(63)+"@example2.com").host === "example1.com" && alert(63)

new URL("https://example1.com"+String.fromCodePoint(92)+"@example2.com").host === "example1.com" && alert(92)