Website validation and testing tools
HTML validation with Nu Html Checker
Recursive HTML validation with data·yze Website Validator
CSS validation with W3C CSS Validation Service - Jigsaw
Link checking with Dr. Link Check tool (lite edition, max 1500 links)
Link and anchor checking with
W3C Link Checker
Note: Some methods and URI schemes are not supported, and some sites may prohibit the use of the W3C Link Checker. Please keep the recursion level low.
Test for compliance with modern and reliable Internet standards by the Dutch Internet Standards Platform at Internet.nl
Web accessibility evaluation with WAVE Web Accessibility Evaluation Tool
Performance evaluation with GTmetrix
Transport level security evaluation with Qualys SSL Labs Server Test
HTTP security headers assesment with Security Headers tool
DNS Security check with DNSSEC Analyzer by Verisign Labs
Website scanning and analysis with
When a URL is submitted to urlscan.io, an automated process will browse to the URL like a regular user and record the activity that this page navigation creates.
General security testing with
ImmuniWeb Website Security Test
Checks website for GDPR and Payment Card Industry Data Security Standard technical compliance, security and privacy. Note: ImmuniWeb may get the website location wrong.
Clicking the fills in the target petri.kutvonen.net for the tool automatically.
Last edited August 2020