Le Pen initially invoked parliamentary immunity to escape judicial pursuit regarding the IS messages, but the French Parliament lifted her immunity in September and the charges will now proceed.
Thursday's charges come as Le Pen is searching for a new way forward for National Front after she lost her presidential bid to Emmanuel Macron previous year.
The crime is punishable by up to 3 years in prison and a fine of 75,000 euros ($91,000).
This article has been adapted from its original source.
It followed a number of complaints, including one by the parents of American James Foley, who was murdered by Islamic State, which is also known as Daesh, in 2014.
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The draft also urged members of the council to take further action against Iran for breaching the arms embargo. That resolution conspicuously avoided the issue of Iranian weapons in Yemen.
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That came seven days after she won the super-G by.01 seconds and shocked everyone, including herself. When reporters grew curious, she explained that winning a gold medal had caught her off-guard.
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Two-time champion Amy Yang and world No. 2 Sung Hyun Park were among six players at 5 under. Another former University of OR golfer, Aaron Wise, had a 76 and was tied for 123rd.
The images were tweeted with the caption "This is Daesh" (an Arabic acronym for the Islamic State group) and showed Foley's bloodied body with his decapitated head on his torso, a man on fire in a cage, and a victim being driven over by a tank.
The investigation is the latest blow to the embattled Ms Le Pen, who lost the French presidential election to Emmanuel Macron in May 2017.
She intends to propose a new name for the party at a National Front meeting later this month, among other reforms aimed at distancing the party from its founder, Marine's father Jean Marie Le Pen. Le Pen accused the French government of not doing enough to prevent the attacks.
In 2015, Le Pen was prosecuted for "incitement to discrimination over people's religious beliefs" for comparing Muslims praying in public to the Nazi occupation of France during World War II.
Along with other right-wing, nationalist movements throughout Europe, the National Front has enjoyed a resurgence amid increasing dissatisfaction with the European Union's immigration policies.