Is it okay to ask for interview feedback after getting rejected?

Yes, it's okay to ask after a rejection, and it doesn't bother reasonable people when you keep it short. Many companies have a policy not to give feedback because of time and legal risk, so expect no reply or a generic one. Still, I've gotten useful notes maybe one out of four times, more often from smaller companies or when I had a take home. Send it within a couple of days of the rejection while you're still fresh in their mind. Aim it at the recruiter or the last person you spoke with, not a random inbox.

Keep it to three or four lines. You can use a subject like "Thanks and quick feedback request." In the body, thank them for their time, say you're not asking them to revisit the decision, and ask if there's one thing you could improve for next time, optionally naming the area you care about like system design or behavioral examples. Add a line that you understand if policy prevents sharing. That framing shows you respect their time and focuses them on one concrete note instead of an essay, and in my experience it yields short but actionable tips when they're able to respond.

I log every interview in an absurd spreadsheet with columns for who ghosted me, and yeah, asking is fine. I'm annoyed at how many apps push paid coaching and yet when you ask a real human for two words of feedback you get the boilerplate or nothing. In my tracking, about one in five replies actually give something useful, and the rest cite policy or legal risk. What works best for me is emailing the last person I spoke to within 24 hours with a short thank you and a single line asking if there was one thing I could have done better. Keep it easy to answer and mention you understand if policy prevents specifics.

Yeah, it's fine to ask. I keep it super short like a thank you and a single line asking if there's one skill I should focus on, because I'm not paying some subscription coach to tell me generic stuff. Half the time you'll get silence, but the few replies I've gotten were specific enough to tweak my setup and try again.

Yes, but most companies won't respond. Send a short thank you and ask if there's one thing you could improve for next time. Do it within a day of the rejection. Then stop thinking about it and move on.