He took part in the founding of the "Nouveau Journal de Paris" in 1827, serving mainly as its drama critic. Later, when the suppression of the privileges of the major journals gave more leeway to the enterprise, he became its editor, transforming it into a political newspaper and embracing the liberal cause. In July 1830 he signed the journalists' protest against government restrictions on the press, and during the three days 26, 27, and 28 July, his journal, now known simply as the "Journal de Paris", was published several times each day. Having supported the change to a more conservative government which occurred on 13 March 1831, the paper was taken over by venture capitalists who were favorable to the new regime, but Pillet stayed on as director and supported ministerial policies.