This is totally what everyone else is going to say, but Search WWW is the one that stands out to fit this vibe.

The three women in it are all strong characters, and all go through phases of being friends, enemies, and things in between with each other.

My recommendation for this is Age of Youth (also known as Hello, Twenties!). Setting is they are living together in one house so expect a lot of fun moments (and heartbreaking moments) with the girls.

The female characters are really relatable yet they are strong in their own ways. You can see their differences but their uniqueness totally blends with each other.

Search: WWW would be my top list!
Age of Youth gots so many interesting women too.
And classic grandmas: Dear My Friend.

I think Healer has strong female leads: Chae Youngshin and Jo Minja both have strong personality and are great in their fields. Though I prefer Jo Minja more. She's still a very cool ahjumma in dramaland to me

When watching THE WITCH IS ALIVE, I still get mental comparisons to THIRTY, NINE. Both shows center on three friends dealing with personal issues. But THIRTY, NINE was a melo-drama that focused on one character's interference and spotlight (complicated by non-show events) that made it disappointing. In WITCH, a very funny dark comedy, the three friends deal independently with the awful men in their lives, but come together to have some capers together. You can see their real friendship through actions and scenes; you can roll your eyes along with them as they slapstick their way to find a solution to their problems.

Female squad :
Age of Youth 1 and 2
Be Melodramatic

Strong female lead with the story focused on her until the end :
Sell Your Haunted House
The King's Affection

Others :
On the Verge of Insanity
The Spies who Loved Me
Forest of Secret 1 and 2
Hotel del Luna
Tomorrow

Be Melodramatic and Work Later, Drink Now had strong female characters and women supporting women. The latter even had an enemies to besties trope between Jung Eun-ji and Han Sun-hwa.

The spies who loved me for an emotionally strong, physically capable and smart FL.
Bloody Heart/Red Heart for a FL giving equal competition to heros and villains alike.

Go Hyunjung (Mishil) x Lee Yo-won(Queen Seondeok) : Queen Seondeok
Go Hyunjung : Daemul
Seo Hyun-Jin's Oh Soojae : Why Her?
Shin Se-kyung : Queen for Seven Days
Lee Bo-young and Kim Seo-hyung : Mine
Search WWW.

I agree with Her Private Life - not just for the friendship between the FL and her BFF, but for the varied collection of other women in her life too -- there's her mom, the mother of the abandoned-then-adopted sort-of brother, the rival fangirl who learns about family from FL's mom, the rival fangirl's mom (who is not really a sympathetic character, but who does get told off by Mom)... there are a lot of strong women in this one.

And let's not overlook the gaggle of ajummas in CLOY. They are great at helping each other through tough spots, never mind trying to help the drop-in stranger who arrives in their town.

I will join the beanies choosing Be Melodramatic and Search: WWW.
Some amazing FL in police dramas: Stranger (season 1 and 2) and Watcher.
I would also recommend Run On (both FL are just so funny and witty) and Sell your haunted house (because Jang Nara is always perfect and watching her in black leather is a must.
Final recommendation is Diary of a prosecutor Jung Ryeo Won is the kind of woman I can relate: independent, professional, hard worker and not willing to smile just because she would look prettier. She's definitely a pot plant.

I’m bad with details but there must’ve been something good about it that i still remember the friendship btw FL & her bestie in She Was Pretty. I remember rooting for them because at that time, dramaland has so little positive female friendship portrayed.

Reply 1988 the women were with each other sharing food and looking out for each other’s families through the good and bad times. They were friends from school days sung together and formed a community and when the one working full time woman was struggling to manage they welcomed her into the group for a brief boost when she returned from her respite. They faced belittling in laws, remarriage, menopause, financial and mental health issues together.

So many good ones!! I agree with all the beanies citing:
Be Melodramatic
Search WWW
King’s Affection
Run On

And want to add:
Mr. Queen - hilarious friendship between the queen and her maids
Twenty five Twenty one - forget the romance, the female friendship is what it is all about!!

Extraordinary Atty Woo - Young-woo, Geu-ra-mi, Sunshine, and the female CEOs of three different law firms (Hanbada, Taesan, and Atty Ryu with her own firm)

Rookie Historian Gu Hae-ryung and her squad of female historians

When the Camellia Blooms - Dong-baek, her estranged mother, and the enemies-to-friends neighborhood ladies

Crash Landing on You - Se-ri and the North Korean village ladies

Be Melodramatic

I Can Hear Your Voice
Hyena
Nobody Knows
My Fellow Citizens
Wok of Love

Would it be a Beanie Recs if I didn’t show up to say Kim Sam Soon? 😆

But seriously, Sam Soon is the OG of strong female characters. Her sis and Mom are great support and she even ends up in a supportive truce with the “other woman”.

Tale of Nokdu has a really strong FL. And a lovely widows/assassins bunch on the side.

20th Century Boy Girl— Strong FL with a strong girl squad as well. All the males are beta males which is really nice to see.

Baumdog Revenge Club— strong ahjumma’s for the win. Women in different social standings helping each other. Puppy male they adopt- haha.

Never give up— dark horse, but it has several strong woman (one who was a loan shark, one who definitely runs her household, one who protects her peers) and a catty mom group who become friends and loyal to another mom. (DANG, this show really has it all.)

Sky Castle— yeah, the women are the ones that are really in charge, or they stand up for their children against their spouses or other outside influences.

- Www Search of course
- I like Stove League: Park Eun Bin is strong but not overbearing. She was the first female operations manager in professional baseball and eventually the first general manager.
- King’s Affection: PEB again
- CLOY: Love SYJ
- King 2 Hearts: I miss Ha Ji Won. She was a N Korean Assasin
- Mr Sunshine: Kim Tae Ri
- Rookie Historian

Another Miss Oh/Oh Hae Young Again has an *almost* enemies-to-friends line... the two Oh Hae Youngs do not end up besties, but they do end up in a much better place than they start out. "Plain" Hae Young has hated "Pretty" Hae Young since school days - even though it turns out Pretty was actually a really nice person and was kind of jealous of Plain the whole time. Then Plain ends up with Pretty's ex-fiance (who of course Pretty would like to have back), but even with all of that the two women negotiate a sort-of friendship once they clear the air.

There are other strong women characters in this one too - this is probably my absolute favorite Kim Mi Kyung eomma character, I literally laughed out loud at her nuttiness and snark but still appreciated her supportive, nurturing, protective mother side. Ye Ji Won's noona character was fabulous too, and I'll even give a nod to the younger brother's girlfriend. These women control all of the men's lives in the show - regardless of whether the guy is willing or oblivious to it.

Agree with almost all the recs so far. If C-dramas are allowed, I just finished Dream of Splendor featuring a trio of smart, talented women who band together to make life in the big city (ancient capital) work.

Mine
Mother
Age of youth
Avengers social club
Sky castle
Angry mom

And the movie Sunny, follows the story of seven high school girls and their older/40 year old selves

They're all strong and awesome in their own way:

Happiness 😎
Secret Forest 😎
One the Woman
Please Don't Date Him (besties)
Fight For My Way (besties)
25-21 (from enemies to besties)
WF Kim Bok Joo (both)
Six Flying Dragons
Good Doctor
Coffee Prince
Faith
It's Beautiful Now (3 FLs)
Flower of Evil 😎
Protect the Boss
Terius Behind Me
The Devil Judge
Work Later, Drink Now (besties)

(I also love the girls from Melo, WWW and Age of Youth like everyone else, of course).

Bonus: Mr Queen. Tricky tho, since Bong Hwan is the FL.
😎= They can fight.