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

⚠ Browser differences

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/szijwyw7r6s?9);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(10)+'@import url(https://fuzz.shazzer.co.uk/hevsddyd72?10);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(12)+'@import url(https://fuzz.shazzer.co.uk/fl8bxt4k4d6?12);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(13)+'@import url(https://fuzz.shazzer.co.uk/bubz8et1mb?13);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(32)+'@import url(https://fuzz.shazzer.co.uk/247h8jbtw4o?32);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(9)+'@import url(https://fuzz.shazzer.co.uk/9lhatmlv0zk?9);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(10)+'@import url(https://fuzz.shazzer.co.uk/4eph94n8pot?10);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(12)+'@import url(https://fuzz.shazzer.co.uk/rxpx7nvtdu?12);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(13)+'@import url(https://fuzz.shazzer.co.uk/vrds5q49u8?13);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(32)+'@import url(https://fuzz.shazzer.co.uk/4g5xk83drwv?32);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(9)+'@import url(https://fuzz.shazzer.co.uk/uzw4cvzo7zr?9);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(10)+'@import url(https://fuzz.shazzer.co.uk/7kj6revv6w5?10);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(12)+'@import url(https://fuzz.shazzer.co.uk/eu8om60747?12);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(13)+'@import url(https://fuzz.shazzer.co.uk/qo3ez2y4f6a?13);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(32)+'@import url(https://fuzz.shazzer.co.uk/30l62s347az?32);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(9)+'@import url(https://fuzz.shazzer.co.uk/hwluepbje0h?9);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(10)+'@import url(https://fuzz.shazzer.co.uk/58cqs8a85ss?10);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(12)+'@import url(https://fuzz.shazzer.co.uk/x3hqks2p2?12);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(13)+'@import url(https://fuzz.shazzer.co.uk/dvb5zo62ev8?13);';
document.head.appendChild(style);

const style = document.createElement("style");
style.textContent = '@x{}'+String.fromCodePoint(32)+'@import url(https://fuzz.shazzer.co.uk/cvoexp0t0cn?32);';
document.head.appendChild(style);