The younger brother of Andr� Ch�nier, he was born at Constantinople, but brought up at Carcassonne. He was educated in Paris at the Coll�ge de Navarre. Entering the army at seventeen, he left it two years afterwards; and at nineteen he produced Az�mire, a two-act drama (acted in 1786), and Edgar, ou le page suppos�, a comedy (acted in 1785), which both failed. His Charles IX was kept back for nearly two years by the censor. Ch�nier attacked the censorship in three pamphlets, and the commotion aroused by the controversy raised keen interest in the piece. When it was at last produced on November 4 1789, it was an immense success, due in part to its political suggestion, and in part to Fran�ois Joseph Talma's magnificent portrayal of King Charles IX of France.
Camille Desmoulins said that the piece had done more for the French Revolution than the days of October, and a contemporary memoir-writer, the marquis de Ferrire, says that the audience came away ivre de vengeance et tourment d'une soir de sang ("drunk with the vengeance and torment of an evening of blood"). The performance was the occasion of a split among the actors of the Comedie Francaise, and the new theatre in the Palais Royal, established by the dissidents, was inaugurated with Henri VIII (1791), generally recognized as Ch�nier's masterpiece; Jean Calas, ou l��cole des juges followed in the same year.
In 1792 he produced his Ca�us Gracchus, which was even more revolutionary in tone than its predecessors. It was nevertheless proscribed in the next year at the instance of the Montagriard deputy Albitte, for an anti-anarchical hemistich (Des lois et non du sang); F�nelon (1793) was suspended after a few representations; and in 1794 Timol�on, set to Etienne M�hul's music, was also proscribed. This piece was played after the Reign of Terror, but the fratricide of Timol�on became the text for insinuations to the effect that by his silence Joseph Ch�nier had connived at the judicial murder of his brother, Andr�, whom Joseph's enemies alluded to as Abel.
In fact, after some fruitless attempts to save his brother, variously related by his biographers, Joseph became aware that Andr�'s only chance of safety lay in being forgotten by the authorities, and that ill-advised intervention would only hasten the end. Joseph Ch�nier had been a member of the Convention and of the Council of Five Hundred, and had voted for the death of Louis XVI; he had a seat in the tribunate; he belonged to the committees of public instruction, of general security, and of public safety. He was, nevertheless, suspected of moderate sentiments, and before the end of the Terror had become a marked man.
His political career ended in 1802, when he was eliminated with others from the tribunate for his opposition to Napoleon Bonaparte. In 1801 he was one of the educational jury for the Seine; from 1803 to 1806 he was inspector-general of public instruction. He had allowed himself to be reconciled with Napoleon's government, and Cyrus, represented in 1804, was written in his honour, but he was temporarily disgraced in. 1806 for his �p�tre � Voltaire. In 1806 and 1807 he delivered a course of lectures at the Ath�ne on the language and literature of France from the earliest years; and in 1808 at the emperor's request, he prepared his Tableau historique de l'�tat et du progr�s de la litt�rature fran�aise depuis 1789 jusqu'� 1808, a book containing some good criticism, though marred by the violent prejudices of its author.
The list of his works includes hymns and national songs among others, the famous Chant du depart; odes, Sur la mort de Mirabeau, Sur l'oligarchie de Robespierre, etc.; tragedies which never reached the stage, Brutus et Cassius, Philippe deux, Tibre; translations from Sophocles and Lessing, from Thomas Gray and Horace, from Tacitus and Aristotle; with elegies, dithyrambics and Ossianic rhapsodies. As a satirist he possessed great merit, though he sins from an excess of severity, and is sometimes malignant and unjust. He is the chief tragic poet of the revolutionary period, and as Camille Desmoulins expressed it, he decorated Melpomene with the tricolour cockade.