impartial
im-par-tial
adjective
Treating all rivals or disputants equally; not favouring one side or party.
"An impartial judge must hear both sides fairly."
Thesaurus
Synonyms: cold-eyed, unbiased, dispassionate, disinterested, indifferent, unbiassed, nonracist, colour-blind, unprejudiced, color-blind
Antonyms: discriminatory, partial, prejudiced