Yahoo has been criticised for its perceived lack of activity over Flickr since it acquired the web service in 2005. But the internet giant said that the revamp is intended to show that Flickr is a "key component" of the Yahoo product strategy.
As part of plans to bring the Flickr experience to millions of users around the world, Yahoo has redesigned the site to make it easier for members to share their lives in photos.
The "evolving design" places photos at centre stage in a more "elegant layout", featuring reduced white spaces around images to create a "visually stunning canvas".
Photos are displayed up to four times bigger than their current size, and can be laid out in a number of different formats to create a more dynamic display.
Flickr also now has simpler navigation options for the billions of photos shared so far on the site, along with new ways to upload and organise images.
More than 3.5 million photos are uploaded to Flickr via PC and mobile devices every day and the site reached its sixth billionth upload last August, but it is also facing increasing competition from Facebook, Twitter, Google+ and the fast-growing Pinterest.
Community management of Flickr has previously been branded "an absolute disaster" by some users, but Yahoo has said that it will improve the customer service operations to more closely respond to user requests.
Flickr is free to use, but a premium paid-for service is available that allows photographers to upload an unlimited amount of photos. The site changed its pricing structure in January to offer a new three-month subscription, while the two-year tariff price fell by $5 to pull in new subscribers.
> Flickr co-founder Caterina Fake launches Pinwheel