Amazon has launched a new “Send To Kindle” button for websites, so content can be sent to Kindle devices and the free Kindle apps for iPhone, iPad and Android phones and tablets.

“Adding the Send to Kindle Button opens a website to millions of Kindle customers who can now enjoy the content on Kindle,” a spokesperson for Amazon tells WebProNews.

“Readers often encounter news articles, blog posts and other content on the web that they want to read but don’t have time to do so immediately,” she adds. “The Send to Kindle Button lets people easily send that content to their Kindle so they can it read later.”

Probably not good news for services like Instapaper.

“Just send once and read everywhere on any Kindle device or free reading app,” the spokesperson says. “No more hunting around for that website or blog that caught your eye – just open your Kindle and all the content you sent is right there. The Send to Kindle Button is also great for readers who want to collect content from the web to use in work projects, school assignments, or hobbies.”

The button can be found on Amazon’s site here. There is also one specifically for WordPress bloggers here.

Users can add Send to Kindle apps to their browsers, desktops and Android apps as well. There is also an option to send by email.