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Characters allowed after hostname but don't change the hostname - Shazzer

Characters allowed after hostname but don't change the hostname

Checks what characters can be added at the end of "example.com", while keeping the hostname "example.com"

Fuzzer

Created Apr 15, 2024

Updated Sep 5, 2026

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CategoryURL Handling

VisibilityPublic

TypeJS

CharsetUTF-8

Template used:

if (new URL("https://example.com" + String.fromCodePoint($[i])).hostname === 'example.com'){log($[i])}

Sample payloads

if (new URL("https://example.com" + String.fromCodePoint(0)).hostname === 'example.com'){alert(0)}

if (new URL("https://example.com" + String.fromCodePoint(1)).hostname === 'example.com'){alert(1)}

if (new URL("https://example.com" + String.fromCodePoint(2)).hostname === 'example.com'){alert(2)}

if (new URL("https://example.com" + String.fromCodePoint(3)).hostname === 'example.com'){alert(3)}

if (new URL("https://example.com" + String.fromCodePoint(4)).hostname === 'example.com'){alert(4)}

if (new URL("https://example.com" + String.fromCodePoint(5)).hostname === 'example.com'){alert(5)}

if (new URL("https://example.com" + String.fromCodePoint(6)).hostname === 'example.com'){alert(6)}

if (new URL("https://example.com" + String.fromCodePoint(7)).hostname === 'example.com'){alert(7)}

if (new URL("https://example.com" + String.fromCodePoint(8)).hostname === 'example.com'){alert(8)}

if (new URL("https://example.com" + String.fromCodePoint(9)).hostname === 'example.com'){alert(9)}

if (new URL("https://example.com" + String.fromCodePoint(10)).hostname === 'example.com'){alert(10)}

if (new URL("https://example.com" + String.fromCodePoint(11)).hostname === 'example.com'){alert(11)}

if (new URL("https://example.com" + String.fromCodePoint(12)).hostname === 'example.com'){alert(12)}

if (new URL("https://example.com" + String.fromCodePoint(13)).hostname === 'example.com'){alert(13)}

if (new URL("https://example.com" + String.fromCodePoint(14)).hostname === 'example.com'){alert(14)}

if (new URL("https://example.com" + String.fromCodePoint(15)).hostname === 'example.com'){alert(15)}

if (new URL("https://example.com" + String.fromCodePoint(16)).hostname === 'example.com'){alert(16)}

if (new URL("https://example.com" + String.fromCodePoint(17)).hostname === 'example.com'){alert(17)}

if (new URL("https://example.com" + String.fromCodePoint(18)).hostname === 'example.com'){alert(18)}

if (new URL("https://example.com" + String.fromCodePoint(19)).hostname === 'example.com'){alert(19)}