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Characters that close an @x with curlies prefix before @import

Checks which characters can be inserted into CSS style declarations before a @x prefix with curlies.

Shazzer Master

Created byhackvertor

Created Aug 6, 2026

Updated Sep 5, 2026

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CategoryCSS Parsing

VisibilityPublic

TypeJS

CharsetUTF-8

Template used:

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint($[i])+'@import url(https://fuzz.shazzer.co.uk/$[rand]?$[i]);';
document.head.appendChild(style);

Sample payloads

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(9)+'@import url(https://fuzz.shazzer.co.uk/pxjtnd3j5q?9);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(10)+'@import url(https://fuzz.shazzer.co.uk/ccf7i2i1z8?10);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(12)+'@import url(https://fuzz.shazzer.co.uk/p68tyg76p4k?12);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(13)+'@import url(https://fuzz.shazzer.co.uk/zzky0ctu2fd?13);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(32)+'@import url(https://fuzz.shazzer.co.uk/k8yti5t431l?32);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(9)+'@import url(https://fuzz.shazzer.co.uk/d2udvq7by5v?9);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(10)+'@import url(https://fuzz.shazzer.co.uk/ve20ugfj64b?10);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(12)+'@import url(https://fuzz.shazzer.co.uk/z2rvq9nrfie?12);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(13)+'@import url(https://fuzz.shazzer.co.uk/ymppx4xd54h?13);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(32)+'@import url(https://fuzz.shazzer.co.uk/jud9pq3szt?32);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(9)+'@import url(https://fuzz.shazzer.co.uk/ud7iwqu5llm?9);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(10)+'@import url(https://fuzz.shazzer.co.uk/ane816t0j6h?10);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(12)+'@import url(https://fuzz.shazzer.co.uk/uqeqxbqa0tp?12);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(13)+'@import url(https://fuzz.shazzer.co.uk/nohyd6up5k?13);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(32)+'@import url(https://fuzz.shazzer.co.uk/e2ty2gook4v?32);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(9)+'@import url(https://fuzz.shazzer.co.uk/ipi1j703m2i?9);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(10)+'@import url(https://fuzz.shazzer.co.uk/frgu73bjddr?10);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(12)+'@import url(https://fuzz.shazzer.co.uk/i4oe4nt5m1c?12);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(13)+'@import url(https://fuzz.shazzer.co.uk/9pmhzymme?13);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(32)+'@import url(https://fuzz.shazzer.co.uk/4zeumrqvfm4?32);';
document.head.appendChild(style);