A former West Australian police officer has appeared in court accused of drugging and raping a number of women he met through online dating sites.

The 50-year-old Kelmscott man was arrested at his current workplace and charged with more than 100 offences against eight women on Wednesday, ranging from stupefying in order to commit indictable offence and aggravated indecent and common assault, to aggravated sexual coercion and aggravated assault causing bodily harm.

The charges also include 32 counts of aggravated sexual penetration without consent and 34 counts of sexual penetration without consent.

The man, who cannot be named for legal reasons, fronted court on Thursday in a high-vis shirt and spoke only to acknowledge each charge before being remanded in custody to appear at a later date.