A reformer is someone who works for reform.
Reformer may also refer to:
Entertainment and media Rutherglen Reformer, a Scottish newspaper first published in 1875 The Reformer, a short-lived American newspaper published in 1837 The Reformers (film), 1916
Religion and philosophy Reform movement, a general term for a social or political movement to bring change Protestant Reformers, theologians in 16th century Europe
Science and technology Catalytic reformer, in an oil refinery Hydrogen reformer, extracting hydrogen Methane reformer, producing hydrogen Methanol reformer, producing hydrogen from methanol Reformer, a personality type in the Enneagram of Personality Steam reformer
Other uses Pilates reformer, an exercise machine Reformers Bookshop, Australia