Action Synthese (or Studio Action Synthese) was a French animation studio founded in 1998 that folded in 2013. The studio produced short films, feature films, television series, and TV ads.

The studio adopted a new version of the stop-motion TV series created by Serge Danot, The Magic Roundabout, in computer animation. The original series was successful between 1964 and 1977 in France and the United Kingdom. The 3D feature film was distributed in 2005 in Europe and the United States in 2006. The Magic Roundabout, a new TV series in 3D animation aimed at preschool children, has been broadcast since 2008 all over Europe (M6, Nickelodeon, ZDF, etc.).

The studio was working on a movie based on the popular novel The Wizard of Oz by L. Frank Baum; a sequel to the 2005 feature film The Magic Roundabout; a film based on Space Goofs called Stupid Invaders in collaboration with Xilam; a movie based on Asterix; and a TV show called Gaya - A Twins Adventure, none of which were completed due to Action Synthese going into compulsory liquidation. The Magic Roundabout was the only film the studio released, along with the reboot series following two years later. Its other TV adaptation, one of the Children's books Russell the Sheep by Rob Scotton, was also canceled.

Short films

• 1998 – Antebios
• 1999 – Premier domicile connu

Feature films

• 2005 – The Magic Roundabout

Television series

• 2008 – The Magic Roundabout (52 x 11 min)
• 2010 – The Magic Roundabout season 2 (52 x 11 min)
• 2011 – City of Friends season 2 (26 x 11mn; 2 specials of 30mn each)