"J'Accuse...!" (French pronunciation: [a.kyz]; "I Accuse...!") is an open letter that was published on 13 January 1898 in the newspaper L'Aurore by mile Zola in response to the Dreyfus affair. Zola addressed President of France Flix Faure and accused his government of antisemitism and the unlawful jailing of Alfred Dreyfus, a French Army General Staff officer who was sentenced to lifelong penal servitude for espionage. Zola pointed out judicial errors and lack of serious evidence. The letter was printed on the front page of the newspaper and caused a stir in France and abroad. Zola was prosecuted for libel and found guilty on 23 February 1898. To avoid imprisonment, he fled to England, returning home in June 1899.

Other pamphlets proclaiming Dreyfus's innocence include Bernard Lazare's A Miscarriage of Justice: The Truth about the Dreyfus Affair (November 1896).

As a result of the popularity of the letter, even in the English-speaking world, J'accuse! has become a common expression of outrage and accusation against someone powerful, whatever the merits of the accusation.J'accuse! is one of the best-known newspaper articles in the world.

Émile Édouard Charles Antoine Zola (, also US: , French: [emil zɔla]; 2 April 1840 – 29 September 1902) was a French novelist, journalist, playwright, the best-known practitioner of the literary school of naturalism, and an important contributor to the development of theatrical naturalism. He was a major figure in the political liberalization of France and in the exoneration of the falsely accused and convicted army officer Alfred Dreyfus, which is encapsulated in his renowned newspaper opinion headlined J'Accuse…!  Zola was nominated for the first and second Nobel Prize in Literature in 1901 and 1902.