Do unpaid internships look bad on a resume?

No, unpaid internships do not look bad on a resume. In fact, you shouldn't specify whether or not your internship was paid on your resume at all. As long as it was a legitimate work experience and your former employer can confirm that the job responsibilities listed on your resume are accurate, your prospective employer should be satisfied.

Additionally, if you're asked about previous compensation during the interview, don't feel compelled to tell the interviewer that your internship was unpaid. Instead, focus on the value you provided in your last role and salary data relevant to the industry, role, and location of the job you're applying for.