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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/rahr72m4hqi?9);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(10)+'@import url(https://fuzz.shazzer.co.uk/hdp7isttawe?10);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(12)+'@import url(https://fuzz.shazzer.co.uk/cuiafs4qqx?12);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(13)+'@import url(https://fuzz.shazzer.co.uk/ijvx72m6s1s?13);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(32)+'@import url(https://fuzz.shazzer.co.uk/g9qvqi43gm?32);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(9)+'@import url(https://fuzz.shazzer.co.uk/3tz22ausng7?9);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(10)+'@import url(https://fuzz.shazzer.co.uk/gsl763k4i5r?10);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(12)+'@import url(https://fuzz.shazzer.co.uk/viamxw1m46i?12);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(13)+'@import url(https://fuzz.shazzer.co.uk/0n4sqaaartt?13);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(32)+'@import url(https://fuzz.shazzer.co.uk/ksfi3frhqxn?32);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(9)+'@import url(https://fuzz.shazzer.co.uk/yfub6ucqel8?9);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(10)+'@import url(https://fuzz.shazzer.co.uk/kl1yetrf1v?10);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(12)+'@import url(https://fuzz.shazzer.co.uk/hmf4yzzvh4l?12);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(13)+'@import url(https://fuzz.shazzer.co.uk/juuolh284fl?13);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(32)+'@import url(https://fuzz.shazzer.co.uk/z7nsdt4z8m?32);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(9)+'@import url(https://fuzz.shazzer.co.uk/7pw31wi8v8?9);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(10)+'@import url(https://fuzz.shazzer.co.uk/9q8cg8z19jf?10);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(12)+'@import url(https://fuzz.shazzer.co.uk/3u101gxdqii?12);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(13)+'@import url(https://fuzz.shazzer.co.uk/qsw8e2cg3nc?13);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(32)+'@import url(https://fuzz.shazzer.co.uk/f0l8r9xlll?32);';
document.head.appendChild(style);