잘 지내세요?

You’ll mostly use this when reconnecting. Imagine you’re sending a DM to a former classmate or an email to an old boss. It serves as the perfect 'icebreaker' that isn't too cold. In a digital world, this is a top-tier KakaoTalk opener. You can also use it when you run into an old neighbor at the grocery store. It shows you recognize them and care about their well-being. Don't worry about being too 'stiff'—the 세요 ending is perfectly polite for most situations. It’s like wearing a nice blazer to a casual dinner; you’re showing effort without being over-the-top. Just don't say it to your cat, unless your cat is very formal and demands respect.

This phrase sits comfortably in the 'Polite/Honorific' category. The root is 지내다 (to spend time/live), and we've added the honorific -(으)세요 to show respect to the listener. This makes it safe for older people, teachers, or colleagues. It’s not quite 'Royal Palace' level, but it’s definitely not 'Backyard BBQ' level. If you're talking to a very close friend of the same age, you'd drop the 세요 and just say 잘 지내?. Using the full 잘 지내세요? with a best friend might make them think you're about to ask for a loan. It's all about that sweet spot of 'friendly but respectful'.

Picture an Instagram comment. Your favorite former coworker posts a photo of their new puppy. You type: 와, 강아지 너무 귀여워요! 잘 지내세요? (Wow, the puppy is so cute! Have you been doing well?). Or imagine a LinkedIn message to a mentor you haven't talked to in six months. You start with this phrase to show you aren't just there for a favor. It also works in Netflix K-dramas when the main characters meet after a 'time skip'. It marks the transition from 'strangers again' back to 'acquaintances'. It’s the universal 'I haven't forgotten you' card.

Use it when the 'time gap' is at least a week or two. It’s perfect for the first day back at the office after a long vacation. It’s great for the start of a semester when you see a professor from last year. Use it when you're writing a holiday card or a New Year's message. If you’re a YouTuber, you might say this to your subscribers at the start of a video if you haven't uploaded in a while. It’s a bridge-builder. It turns a cold 'Hello' into a warm 'I care about your life history'.

Never use this with a complete stranger, like a bus driver or a cashier. They will be very confused. In their head, they’ll be thinking, 'Do I know this person from a past life?' Also, avoid it if you just saw the person yesterday. It sounds redundant and a bit robotic. If you’re in a high-stress, fast-paced environment, a simple 안녕하세요 is better. 잘 지내세요? requires a moment of pause. If the other person is running for a train, don't trap them with a question about their entire life's well-being. That’s just cruel.

This is the big one. Never use the 세요 ending for yourself. It’s an honorific meant to lift the *other* person up. If you use it for yourself, you’re basically calling yourself 'The Great and Powerful Me'. It’s a one-way street of respect.

Unless you are best friends with the barista, this is way too personal. It’s like asking a stranger for their blood type. Keep it professional with a standard greeting.

If you want to be a bit more casual but still polite, you can say 잘 지냈어요?. This is the past tense version ('Have you been doing well?'). It’s very common in daily speech. For your absolute best friends, just go with 잘 지내?. It’s short, punchy, and says 'We are close enough that I don't need to be fancy'. On the flip side, if you're meeting a CEO or someone very high-ranking, you might hear 잘 지내셨습니까?. That’s the 'Black Tie' version. It’s very formal and usually reserved for business or military contexts.

Can I use this in an email? Yes, it’s the standard polite opening for someone you haven't emailed in a while. Is it weird to say to a younger person? Not if you want to be polite, but 잘 지내요? (without the 세) or 잘 지내? is more common if you're much older. Do I have to give a long answer? No, a simple 'Yes, I'm doing well' is the standard polite response. It’s more about the gesture than a detailed medical report. Just keep it light and friendly!