7 Easy Ways to Check When a Webpage was Last Updated

Many web pages are updated after publication, which can make it difficult to know whether you are reading the most updated information.

Knowing the most recent date of updates to an article can help verify its accuracy.

Use the following step-by-step guide to learn the best way to check the last modified date of a web page!

How to Check When a Web Page Was Last Updated

Most pages published on the Internet have a publication date and last updated date attached to it. But sometimes, website owners may not post this information. So we would need to use other methods to find out when a page was last updated to validate its relevance and recency.

The last modified date lets you know when the web site owners last made changes to the page content.

This may include minor changes or major changes.

1. Check the blog post’s last update date

The first method is the easiest one. See if there is a publishing date or last updated date on the blog post.

Some website administrators choose to update the publishing date shown at the top of blog posts after any change to its content.

For example, I’m using Elementor to build my website and can set up a last update date function for every blog post.

So at the top of the post, you can see the last updated date of the article. This helps my readers know that they are getting the most recent and relevant information.

You can also find the date of the last major update using various technical elements, such as the HTTP header or the XML sitemap.

You should have no problem checking the published date and date of the last major update for any web page with the following methods:

2. Check the HTTP Header

You can look at the HTTP header to find the last modified date of a static web page.

The data contained in the header includes a timestamp of the date that the file was last modified.

Every HTTP request and response includes HTTP headers.

Response headers contain information about the file that you request, for example, a web page.

Check last-modified field using a free tool

I’m using a free online tool, Keycdn to quickly check the HTTP header of any URL.

Response headers include descriptions of the last modified date, cookie settings, content type, path, current date, server type, and other useful details.

Web servers generate the most response headers.

However, website administrators may also customize the headers to suit their needs, such as adjusting the timeframe for storing cookies.

Google Developer Tools

Open the Developer Tools in Google Chrome which allows you to view the last-modified field from HTTP headers.

1. Right-click on the webpage and select “Inspect”.
2. The “Network” tab includes all the requests that occur when you load a web page.
3. Reloading the page and selecting the HTML page will display the HTTP headers in a tab on the right.

You can also use Developer Tools on Android phones, such as Pixel phones.

View page source

Alternatively, you can also right-click on a webpage and select “view page source”.

This shows you the source code of the page which includes metadata, including the published time and modified time for the page.

Keep in mind that the date that appears in HTTP response headers and metadata may not always match the last date of a website update.

Dynamic webpages with server-generated content may include the current date as the date that the last update occurred.

The accuracy of the date in the HTTP headers and metadata depends on the website administrators and the type of content management system used.

Some systems may use a different way of updating time and date information.

3. Last modified date in XML Sitemap

You can use the XML sitemap from a website to view when a specific URL was last modified. If the XML sitemap is regularly updated, it may contain an accurate timestamp of when a page was last updated.

The XML file contains a list of web pages on a domain.

Website administrators use XML sitemaps to help Google and other search engines crawl their sites and find essential pages.

XML sitemaps may contain the following information for each entry:

• The URL of the page
• The date of the last modification
• The priority of the URL
• The frequency of changes to the URL

XML sitemaps only need the URL and date of the last modification for each page.

However, some website owners may choose to use the “priority” and “changefreq” tags to set the priority and frequency of changes for each URL.

How to locate a website’s XML sitemap

Some websites include a link to the sitemap in the footer.

You may also find the XML sitemap by searching for the website’s RSS feed. RSS feeds use XML files to compile lists of blog posts or other URLs.

You can also try searching for the sitemap using the following query:

“site:sitename.com sitemap”

XML sitemaps are updated manually or automatically.

For example, some content management systems automatically add the date when you edit a page. Other platforms may take the date from the metadata or use the current date.

4. Use Google Search

Standard Google search results may include the publication date next to the meta description in search result entries.

Indexed date

This is also the index date of your web page on the search results.

It tells us the date when Google’s web crawlers indexed the page for public display in the search engine results pages (SERPs).

However, Google cannot always determine the publication date and occasionally omits it from the search results.

So what we can do to find the date is to add a special parameter at the end of the search bar.

• After Google returns the results, click the browser’s address bar and navigate to the end of the HTTP string.
• Add the following parameter at the end of the string in the address bar: “&as_qdr=y15”

The “as_qdr” parameter is used for advanced date searches. You can use d[x], w[x], or y[x] to specify how many days, weeks, or years back you want to search.

• Hit “enter” to complete the search.

A date will appear in front of the meta description for all the pages in the search results.

The date is the date that the page was last indexed, which is often a rough indicator of when the page was last updated.

Yet, it takes Google anywhere from four days to six months to crawl a website.

You can also request for Google to recrawl your website or a specific page after a significant content update.

5. Use Google Cache

Using a Google Cache Checker is another method for estimating the last time that a web page was updated.

Many SEO blog sites include cache checkers for looking up cached versions of pages.

The date shown is the date that Google last cached the page.

Google previously allowed you to view a snapshot of cached content by clicking on an option at the end of the URL in the search results.

The search results now include a pop-up menu for each URL with additional information. Click the three dots > More > Cached.

Google made the changes recently, along with their broad core algorithm update.

The core update changed how Google ranks and displays pages. The pop-up may include the date that Google first indexed the page. If the date is older than ten years, the pop-up may not include a specific indexed date.

But you’ll see the webcache version and the exact date when it was stored in their search index! I suppose this cache date may be the easiest way to check the date of the web page when Google first found it.

6. Use a JavaScript Command URL

Adding a small snippet of JavaScript code to the end of the HTTP string in the address bar is an easy way to reveal the last update date of the article.

Delete the URL from the address bar and paste the following line:

“javascript:alert(document.lastModified)”

After you hit “enter”, the browser should display a JavaScript alert containing the last modified date of the webpage.

You may also run code snippets from the Developer Tools in Chrome.

Right-click on the webpage and select “Inspect” to open the Developer Tools.

Click on the “Console” tab and enter the JavaScript code.

The date should appear instantly. However, the time stamp is not always accurate.

As with several of the other methods, the date displayed depends on several factors. You need to consider the type of content management system and whether the website owner manually updates the date in the metadata or sitemap.

7. Use the Internet Archive

The Internet Archive has a database containing millions of snapshots of web pages.

The database is called the Wayback Machine.

The snapshots help archive websites, allowing you to view older versions of current pages and pages that are no longer available.

The goal of the Wayback Machine and the Internet Archive is to maintain a historical record of the internet.

The organization collects digital content ranging from books and music to websites.

You can use the Wayback Machine to search cached versions of existing pages.

How to use Wayback Machine

1. Simply enter the URL of the web page that you want to search.
2. The archive will present a calendar.
3. The highlighted dates include snapshots.

The Internet Archive uses crawlers to automatically search and index websites. However, the Wayback Machine does not contain every web page created. Some sites may not appear in the database. This is especially true for new content.

The Wayback Machine may also fail to record every change.

A snapshot may be taken days or weeks after an update.

Due to these details, the Wayback Machine does not always offer the most up-to-date log of when a web page was last updated.

Which method is best?

In the end, HTTP headers, XML sitemaps, and metadata may help you figure out the last time that a website underwent a major update, or a specific blog post was updated.

Finding the date of a website can have a significant impact on a variety of activities, such as performing research for a research paper.

For example, the date matters when relying on a blog post on face masks, statistical capacity indicators, Windows updates, and other time-sensitive information.

In search engine optimization, it is a good practice to keep website content updated and as relevant as possible. Finding the date when your competitors have updated their content for example, can give you a general idea of their SEO/content strategy.

With Google’s helpful content update, it may be a good idea to keep our content updated on a regular basis and maintain fresh content on our site.

The information from several years ago may not be as relevant compared to articles updated a few days ago.

The accuracy of these methods depends on the content management system. Some systems dynamically update the headers and sitemaps each time a visitor views a web page.

The snapshots stored on the Wayback Machine may offer the best practice for identifying the last major update of a web page.

You can use the snapshots to compare versions of a page or search for a security update.

If you cannot determine the last updated date of a web page, try contacting the website owner or administrator. Websites for legitimate businesses and online activities should contain contact information.

Make sure that you include the URL that you want to know more about. However, you may not always receive a response.