Advanced Last Modified Date Checker - All Detection Methods
This advanced last modified date checker displays ALL 8 detection methods
we use to find when a webpage was last updated. Unlike the standard checker
which shows only the most reliable date, this tool lets you:
Compare all detection methods side-by-side
Sort results by date or method
Filter by specific detection types
Understand why different methods return different dates
Perfect for SEO audits, content inventory management, and understanding
how different systems track page modifications. Each method has strengths
and weaknesses - use the sorting and filtering to find the most reliable
date for your specific use case.
This tool is part of The Laughing Professor On Page SEO Toolbox, where multiple diagnostics and generators are combined into a single workflow for site optimization.
Why Do Different Methods Show Different Dates?
Different detection methods track different types of changes...
Which Last Modified Date Should I Trust?
For SEO purposes, prioritize HTTP headers and sitemap data...
When Should I Use the Advanced Checker?
Use this tool when you need to verify dates, audit content age, or compare multiple detection methods...
This page achieves a perfect 10/10 WAVE score using our
Accessibility Widget -
the same tool that improved our score from 8.8 to 10.0
Accessibility Notice:
This widget provides visual accessibility enhancements for website visitors.
It does not guarantee full WCAG or ADA compliance and should be considered
a usability enhancement tool, not a legal compliance certification.
"Accessibility verification is based on WCAG best practices and automated testing tools such as WAVE. This does not constitute legal certification."
