• Overview
  • Topics
    • 0day
    • 2FA
    • Amplification
    • Android
    • anecdote
    • Arduino
    • ARM
    • ASN
    • Autonomous System
    • BGP
    • Breach Monitoring
    • Bufferbloat
    • C
    • Censorship
    • Certificate
    • Cheatsheet
    • Code
    • CTF
    • CVE
    • Data Breach
    • Data Tools
    • Dataset
    • DDoS
    • Diagnostic Tools
    • diff
    • difftastic
    • Disk Encryption
    • Disposable Email
    • DKIM
    • DMARC
    • DNS
    • DNSSEC
    • Docker
    • Domain Rankings
    • Email
    • EXIF
    • Fedora
    • Game
    • Git
    • GPS
    • Hash
    • HTML
    • HTTP
    • humor
    • IANA
    • Icon
    • IETF RFC
    • Image
    • IP
    • IPv6
    • IXP
    • JSON
    • LaTeX
    • LUKS
    • Machine Learning
    • Malware
    • Map
    • Markdown
    • Movie
    • MTA-STS
    • Network
    • Network Testing
    • Networking
    • Paper Writing
    • Password
    • PCAP
    • Performance
    • PGP
    • Privacy
    • Protocols
    • Proxy
    • Python
    • QUIC
    • Regex
    • Reverse Engineering
    • RPKI
    • Rust
    • Search
    • Security
    • Security Research
    • Shell
    • Spam
    • SPF
    • SQL
    • TCP
    • technical-support
    • TeX
    • Threat Intelligence
    • Tips&Tricks
    • TLS
    • Tool
    • Tools
    • TPM2
    • Traceroute
    • Tutorial
    • Tutorials
    • Unicode
    • VPN
    • VS Code
    • Vulnerability
    • Windows
    • x86
  • Publications
  • Cloudflare Rule Linter

W3C Link Checker

https://validator.w3.org/checklink

HTML | Tool

The W3C Link Checker crawls your website and reports broken or outdated links. The tool reports on broken links (e.g., 404), broken or missing websites, and links that should be updated to a new location.

Many more W3C checkers exist, for example, HTML, CSS, or RSS validation. https://www.w3.org/developers/tools/ provides an overview.