Check your page for proper IfModifiedSince handling

General Tools
Duplicate Content Analysis
Check your pages for in-site duplicate content on a block level with a shingle-analysis.
To WWW or not? Domain check
Check your domain to determine the optimal domain name, 301's and canonicals.
Check 'IfModifiedSince' handling
Check to make sure your IfModifiedSince and Last-Modified handling is correct
Check server headers
Check your server's headers, check 404-handling and check for correct redirects
Page Title and Headers
Page titles and headers are very important elements for search engines.
Link Analysis
Find out about all links on a page, including hidden ones and nofollow-markers
Keyword frequency
Determine keyword frequency for 1,2,3-word phrases
Spider simulator
See a page as a search engine spider will see it, headers, text and links
Javascript content hiding
Hide content on your site from search engines and other crawlers / bots
The AOL search database
Currently completely online, available for your searching and browsing
Mobile browser tools
Website diagnosis tools for mobile browsers, phones, handhelds, etc.

 
Firefox Extension
Get our Firefox Extension to use these tools from your context-menu!
Search Engine Referrers
A statistic tool to find interesting information about your visitors.
Collected ramblings
Articles, tips, tricks and ideas for websites in general
Yahoo! Secret Site-Info
Yahoo!s information for your site regarding the number of links and deep links
Yahoo! Uniqueness Test
Testing the uniqueness of a web page or a text snippet with shingle analysis
Google datacenter tools
Google World-Wide
Try Google geolocation targeting in search from all over the world.
Google's results over DCs
Check your favorite query on a different datacenter (images, news, blogsearch, etc)
Indexed page count per DC
Find the number of known pages in Google per datacenter
Supplemental index count per DC
Find the number of pages in the supplimental index in Google per datacenter
Recognized links per DC
Find the number of known links in Google per datacenter
Cache-Date per DC
Check the date a URL was last cached by Google per datacenter
Google Pagerank in general
Check Googles PR value for a page
Google Pagerank per DC
Check Googles PR value over multiple datacenters
Give a DC a name!
So you like (or hate) a Google datacenter? Give it a name of your own!
Search with Pagerank
Do a normal Google search (requires free Google API-Key), see results with PR-number

This tool will check your server with the specified page using IfModifiedSince HTTP headers. Proper handling of IfModifiedSince requests can save a lot of bandwidth on your end. It is fairly easy to insert code to handle these requests on your pages. Note: you need to resubmit this form if you wish to update the cache on this server (otherwise it will display the results of the last test). Also see: IfModifiedSince code for asp.net, IfModifiedSince code for classic asp or IfModifiedSince code for PHP.

This tool identifies itself with the following user-agent (this might be logged on the server):

oyoy.eu Server Header Checker, User IP: 38.107.191.114 (http://oyoy.eu/)

Please enter the full URL for the page you want to check. The URL must begin with HTTP (secure sites cannot be tested at the moment). Example: http://www.cnn.com/

URL to check:

Date to check for with IfModifiedSince:

  or try one of the samples: