1 guide, each rated 1 to 5 with the reason — and two lists per place, where you are comfortable and where to pay attention. Nowhere is called dangerous; the specific thing is what helps.
Safe city. Two specific scams to know: taxi drivers who quote in euros, and bars where a friendly local invites you in and the bill arrives enormous. Use Bolt and pick your own bar.
Comfortable: District V · Buda Castle · Városliget · District VII
Consumption-scam bars, where a stranger invites you and the bill is hundreds of euros
Blaha Lujza tér — and District VIII around it, late at night
Unlicensed taxis — only Főtaxi and the apps
The ratings are this site's own, from the guides' authors and the corrections readers send in; they are not an index. Read the general advice in travel safety tips.