If you love heart-pounding fights, epic battles, and stories that keep you on the edge of your seat, Korean action webtoons are made for you. From deadly assassins and powerful martial artists to clever strategists and supernatural warriors, these webtoons pack nonstop excitement. We’ve put together a list of the 30 best Korean action webtoons to read online in 2025, full of thrilling adventures, unforgettable characters, and action that will keep you hooked from the first page. Whether you’re new to webtoons or a longtime fan, there’s something here for everyone.
1. Omniscient Reader
- Reads: 530.3 million
- Subscribers: 4.3 million
- Status: Ongoing
- New Episodes: Every Tuesday
Meet Dokja, an ordinary office worker who’s obsessed with his favorite web novel, Three Ways to Survive the Apocalypse. One day, the story suddenly becomes real, and the world starts heading toward chaos. The crazy part? Dokja’s the only one who knows how it all ends. Armed with this knowledge, he has to navigate dangerous challenges, outsmart enemies, and try to change the fate of the world. Packed with action, suspense, and clever twists, Omniscient Reader is a must-read for anyone who loves thrilling Korean action webtoons.
2. Teenage Mercenary
- Reads: 268.6 million
- Subscribers: 2 million
- Status: Ongoing
- New Episodes: Every Wednesday
Ijin Yu’s childhood was anything but normal. After losing his parents in a plane crash at eight, he had to survive as a child mercenary in a foreign land. Ten years later, he finally returns to Korea, thinking life will be peaceful, but high school turns out to be its own battlefield. With just one year left, Ijin has to learn new tactics to survive the chaos of teenage life. Packed with action, clever strategies, and plenty of laughs, Teenage Mercenary turns the everyday school experience into an epic, action-packed adventure.
3. Eleceed
- Reads: 444.4 million
- Subscribers: 2.2 million
- Status: Ongoing
- New Episodes: Every Tuesday
Jiwoo is a kind-hearted guy with lightning-fast reflexes, using his powers to quietly make the world a better place, rescuing kids, animals, and anyone in need. Then there’s Kayden, a genius secret agent…who’s stuck in the body of a chubby old cat. Together, this unlikely pair combines Jiwoo’s super-speed with Kayden’s brains to take down the bad guys. Full of action, humor, and heart, Eleceed is the perfect mix of thrilling battles and fun moments, making it a must-read Korean action webtoon for anyone who loves clever, fast-paced adventures.
4. The Regressed Mercenary Has a Plan
- Reads: 17.5 million
- Subscribers: 433,634
- Status: Ongoing
- New Episodes: Every Wednesday
Cecil Perdium, the famed Mercenary King, dies before he can avenge his family, then wakes up as his teenage self. Now, he has a second chance to rebuild his strength, repair his reputation, and save his family from disaster. But it won’t be easy: soldiers and knights are defecting, and danger lurks at every turn. Packed with strategy, intense battles, and clever twists, The Regressed Mercenary Has a Plan is a thrilling Korean action webtoon perfect for anyone who loves revenge, tactical warfare, and a hero fighting to change his fate.
5. Ordeal
- Reads: 55.3 million
- Subscribers: 654,183
- Status: Ongoing
- New Episodes: Every Friday
Che is just a regular human in a world full of superpowered “Kimyos,” but he’s determined to become the greatest fighter alive. When his beloved mentor is murdered, he sets out on a quest for revenge, only to discover the Kimyo world is far bigger and more dangerous than he ever imagined. Even crazier, Che might actually be the most powerful Kimyo on Earth, with the power of the sun itself. Packed with epic battles, high stakes, and thrilling twists, Ordeal is a must-read Korean action webtoon for anyone who loves intense adventures and jaw-dropping power-ups.
6. Jungle Juice
- Reads: 128.3 million
- Subscribers: 1.5 million
- Status: Ongoing
- New Episodes: Every Wednesday
Suchan Jang seems like a top-tier college student, but everything changes when a mysterious bug spray called “Jungle Juice” gives him a pair of insect wings. His life falls apart after he reveals his secret to save someone, but then he discovers a hidden world of insect humans where everyone is accepted, but survival isn’t easy. Packed with action, suspense, and plenty of twists, Jungle Juice is a thrilling Korean action webtoon for anyone who loves unique powers, secret societies, and high-stakes adventures.
7. The Primal Hunter
- Reads: 17.4 million
- Subscribers: 273,083
- Status: Ongoing
- New Episodes: Every Monday
Jake seems like an ordinary office worker until he’s suddenly thrown into a dangerous fantasy world full of monsters and challenges. But instead of panicking, he rises to the occasion, using his skills and determination to survive. As he explores this vast multiverse, Jake grows stronger, eventually evolving from a regular office worker into a true apex hunter. Packed with action, adventure, and epic battles, The Primal Hunter is a thrilling Korean action webtoon perfect for anyone who loves transformation stories and high-stakes fantasy adventures.
8. Villain to Kill
- Reads: 120.8 million
- Subscribers: 1.4 million
- Status: Ongoing
- New Episodes: Every Tuesday
In a world where some people use their powers for evil and others fight for justice, Cassian Lee is a powerful, kind-hearted psyker. But during a trip to Greece, everything goes sideways; he wakes up in the body of a Korean high school boy who’s just become a villain! Now Cassian has to navigate high school life while trying to stick to his sense of justice. Packed with action, suspense, and tricky moral choices, Villain to Kill is a thrilling Korean action webtoon that keeps you guessing who’s really the hero or the villain.
9. Ultimate Shut-in
- Reads: 8.1 million
- Subscribers: 270,019
- Status: Ongoing
- New Episodes: Every Wednesday
Jaehyeon’s city is suddenly overrun by monsters, but he discovers a unique power that makes him the master of his entire apartment building, though he can’t step outside. From the comfort of his own home, he has to train his neighbors, come up with clever strategies, and lead them to survive in this post-apocalyptic chaos. Packed with action, suspense, and smart tactics, Ultimate Shut-in shows that even a shut-in can become a hero. It’s a thrilling Korean action webtoon for anyone who loves high-stakes adventures with a fresh, clever twist.
10. Artifact-Devouring Player
- Reads: 4.2 million
- Subscribers: 154,577
- Status: Ongoing
- New Episodes: Every Friday
Sanghyeon has an unusual power: he can absorb the abilities of magical artifacts by literally devouring them. After thirty years of honing his skills, he’s fifty-five and stuck in a life of mediocrity. But then, he’s mysteriously sent back in time to the day he first awakened as a monster-hunting player. With a second chance, Sanghyeon dives in, absorbing incredible powers and climbing the ranks faster than ever. Packed with action, clever strategy, and epic growth, Artifact-Devouring Player is a thrilling Korean action webtoon for anyone who loves second-chance adventures and high-stakes battles.
11. The World After the Fall
- Reads: 96.2 million
- Subscribers: 1.2 million
- Status: Ongoing
- New Episodes: Every Monday
When mysterious towers appear and start unleashing monsters, specially gifted fighters called Tower Walkers step up to protect humanity. Most of them choose to escape death by using a “regression stone,” which sends them back to the past but into a completely different timeline. Jaehwan, however, refuses to run. Instead, he stays in the original world and keeps fighting, determined to see things through. Along the way, he uncovers shocking secrets about the Tower and what’s really going on. The World After the Fall is a gripping Korean action webtoon full of mystery, high stakes, and nonstop intensity.
12. Paranoid Mage
- Reads: 15.3 million
- Subscribers: 254,066
- Status: Ongoing
- New Episodes: Every Tuesday
Callum has spent his whole life seeing things no one else seems to notice: monsters, hidden beasts, and mages blending in with everyday people. When he finally awakens his own portal magic, he wants absolutely nothing to do with that secret world. But the Guild of Arcane Regulation insists every mage must swear loyalty and serve under them. Callum’s response? No thanks. If the Guild wants him, they’ll have to chase him down. Paranoid Mage is a fast-paced, magic-filled adventure perfect for readers who love rebellious heroes and worlds full of hidden danger.
13. A Flame Reborn
- Reads: 12.5 million
- Subscribers: 192,685
- Status: Ongoing
- New Episodes: Every Friday
Logan MacLine is a worn-out knight fighting for his kingdom’s independence, determined to take revenge on the empire that executed his brother. But after dying in battle, he suddenly wakes up as his younger self long before he ruined his reputation. With all his past-life experience, Logan starts gathering talented allies, creating new weapons, building an army, and earning the money needed to fuel a real rebellion. Along the way, he also has to mend things with his family and try to stop the empire’s rise for good. A Flame Reborn is a gripping, action-packed second-chance story with strategy, heart, and plenty of intensity.
14. The Returned C-Rank Tank Won’t Die!
- Reads: 3.6 million
- Subscribers: 199,570
- Status: Ongoing
- New Episodes: Every Sunday
Cho-i Hyeon, a timid C-rank hunter, is betrayed by her team and left to die deep inside a dungeon. There, she stumbles upon a cursed ring that keeps her alive by regenerating her body over and over, for years. By the time she finally escapes, she’s nothing like the girl they abandoned. She’s stronger, colder, and carrying something unsettling inside her. Now she wants answers…and revenge. But the ring seems to have a will of its own, and its true cost is only starting to show. The Returned C-Rank Tank Won’t Die! is a dark, action-packed ride from start to finish.
15. Hardcore Leveling Warrior: Earth Game
- Reads: 11.1 million
- Subscribers: 197,056
- Status: Ongoing
- New Episodes: Every Wednesday
After a comet slams into Earth, the world suddenly transforms into a giant game filled with monsters, dungeons, and total chaos. In the middle of it all, Ethan wakes up as Hardcore Leveling Warrior, his overpowered in-game character known for crazy luck and brute strength. Now he’s back and ready to rise to the top again… only this time, the battlefield is the real world. Hardcore Leveling Warrior: Earth Game is a fun, fast-paced Korean action webtoon packed with adventure, power-ups, and nonstop excitement.
16. Returned by the King
- Reads: 20.5 million
- Subscribers: 360,270
- Status: Ongoing
- New Episodes: Every Saturday
In a world where your worth is judged by your skills, 35-year-old Taehyeon is struggling just to get by as a pack bearer for monster hunters. That is, until a mysterious being called “the King” gives him a unique skill and a second shot at life. Reborn back in high school, Taehyeon now wields Gluttony, a power that lets him block and absorb the abilities of others. Packed with action, clever strategies, and epic battles, Returned by the King is a thrilling Korean action webtoon perfect for fans of second-chance adventures and power-packed stories.
17. The Top Assassin in Another World
- Reads: 152,887
- Subscribers: 36,422
- Status: Ongoing
- New Episodes: Every Tuesday
By day, Kai Shinjo is just an ordinary high school student, but by night, he’s a deadly assassin, keeping to himself and staying in the shadows. Then one day, his entire class gets transported to a magical world as Hero candidates tasked with defeating the Demon Lord. Every student receives a special Blessing, but Kai’s power, Appraisal, doesn’t seem like much. Luckily, his assassin skills and cold precision make him a deadly player in this new world. The Top Assassin in Another World is a thrilling Korean action webtoon packed with stealth, strategy, and high-stakes battles.
18. Absolute Sword Sense
- Reads: 24.9 million
- Subscribers: 256,568
- Status: Ongoing
- New Episodes: Every Sunday
Woonhwi So has always been the black sheep of his family and clan, stuck serving as a low-level spy for the Blood Cult because his spirit core is destroyed. During a mission to find the legendary Blade Scroll, he’s killed only to wake up 10 years in the past, on the very day he was first kidnapped. Now, with a mysterious new ability to hear the voice of a dagger, Woonhwi has a second chance to change his fate. Absolute Sword Sense is a thrilling Korean action webtoon packed with revenge, adventure, and epic sword fights.
19. Hero Killer
- Reads: 100.9 million
- Subscribers: 1.1 million
- Status: Ongoing
- New Episodes: Every Thursday
The world is constantly at war, with battles raging between Heroes and Villains. In the middle of it all, a girl with supernatural abilities sets out on a bloody path of revenge, taking on the injustices around her. With titanic clashes everywhere, no one is really safe, and the lines between good and evil start to blur. Hero Killer is a gripping Korean action webtoon full of intense fights, tough moral choices, and high-stakes drama, perfect for anyone who loves dark, thought-provoking stories about what it really means to be a hero or a villain.
20. Murim RPG Simulation
- Reads: 39 million
- Subscribers: 421,073
- Status: Ongoing
- New Episodes: Every Friday
Seolhwi is just a scout in the infamous Demon Cult when his squad runs into a master from the Mount Hua Sect, and the entire team is wiped out in an instant. As he’s lying there, dying and regretting years of service, a video game-like prompt suddenly appears: start over. With a second chance in hand, Seolhwi is determined to survive, grow stronger, and climb to the top of the Demon Cult. Murim RPG Simulation is an exciting Korean action webtoon packed with martial arts, strategy, and RPG-style thrills that keep you on the edge of your seat.
21. System Universe
- Reads: 728,099
- Subscribers: 67,868
- Status: Ongoing
- New Episodes: Every Tuesday
Derek lives by one rule: fight, adapt, and trust only himself. After the System transformed Earth into a monster-filled wasteland, this mindset made him one of the strongest warriors around. But when he breaks his own rules, gets betrayed by his teammates, and is thrown into a completely new world, he’s back to level 1. Luckily, he still has his old System, giving him a shot at regaining his power and rising to the top again. System Universe is an intense Korean action webtoon packed with strategy, epic battles, and high-stakes survival.
22. Infinite Leveling: Murim
- Reads: 51.7 million
- Subscribers: 398,881
- Status: Ongoing
- New Episodes: Every Wednesday
Yuseong Dan dies on the battlefield without any glory, but then he’s given a mysterious quest and leveling system, a second chance to become stronger. Each mission keeps getting tougher, pushing him to his limits. To avoid the same miserable fate, he has to level up fast and prove himself. Infinite Leveling: Murim is a thrilling Korean action webtoon packed with intense battles, smart strategies, and non-stop action, perfect for anyone who loves martial arts, RPG-style progression, and watching an underdog rise to become a true powerhouse.
23. The Overpowered Support
- Reads: 250,177
- Subscribers: 45,021
- Status: Ongoing
- New Episodes: Every Monday
Ho Kim is the ultimate support player in the RPG Dragon Slayer Academy, having leveled up 1,000 heroes to S-rank. When a hidden quest offers the chance to push them even further to EX-rank, he jumps at it only to find himself trapped inside the game world. Now he has to survive, strengthen his heroes, and figure out the secrets of this mysterious quest. The Overpowered Support is a fun, action-packed Korean webtoon full of adventure, clever strategies, and RPG-style thrills, perfect for anyone who loves watching an underdog or support rise to the top.
24. Boundless Ascension
- Reads: 48.9 million
- Subscribers: 589,356
- Status: Ongoing
- New Episodes: Every Sunday
Seong-yun Han lost his parents to monsters during a mysterious event called the “Dungeon Break.” Seven years later, despite all his training to become a Hunter, a warrior who fights and destroys monsters, his abilities haven’t improved at all. Everything changes when he’s invited to the Tower of Trials, a dangerous otherworldly realm where challengers face deadly tests against both monsters and humans. Boundless Ascension is an exciting Korean action webtoon packed with intense battles, high-stakes challenges, and epic growth, perfect for anyone who loves thrilling adventures and watching an underdog rise against all odds.
25. Chronicles of a Doomed Prodigy
- Reads: 3.9 million
- Subscribers: 114,088
- Status: Ongoing
- New Episodes: Every Friday
Yeonshin was born with incredible martial arts talent, a gift from the heavens, but also a curse that could cut his life short before adulthood. With the right opportunities, he might have become a legendary hero or even the reincarnation of the Heavenly Demon. Instead, fate drops him into the unremarkable Jeong Clan, a family with little influence or prestige. With time slipping away, Yeonshin must find a way to defy his doomed destiny. Chronicles of a Doomed Prodigy is an action-packed Korean webtoon full of martial arts, high-stakes challenges, and relentless determination.
26. Valhalla Saga
- Reads: 5 million
- Subscribers: 162,701
- Status: Ongoing
- New Episodes: Every Tuesday
In Valhalla, a warrior’s strength comes from their Saga, a magical power shaped by the feats of their past life. Taeho, once a top pro gamer, never imagined he’d become a real warrior. But his in-game character, the legendary Karstedt, now leads him in a real-world fight. Tasked with stopping Ragnarok and saving the world from destruction, Taeho must start a new saga, master his powers, and face incredible challenges. Valhalla Saga is an exciting Korean action webtoon packed with epic battles, adventure, and the thrilling journey of an unlikely hero stepping up to greatness.
27. The Fistfighting Genius Mage
- Reads: 1.8 million
- Subscribers: 80,207
- Status: Ongoing
- New Episodes: Every Tuesday
Zed, a former MMA champion, wakes up in the body of a scrawny prisoner in a dangerous fantasy world. Reborn into the feared Arahan family, he’s stuck in a brutal magical internment camp with no spells to rely on. So he trains his body to become a living weapon. When he escapes with his clever ally Riu, they’re hunted by a ruthless warden and a powerful noble house. The Fistfighting Genius Mage is an action-packed Korean webtoon full of intense battles, smart strategies, and one man proving that sometimes fists are mightier than magic.
28. Blood System
- Reads: 1.5 million
- Subscribers: 81,986
- Status: Ongoing
- New Episodes: Every Monday
In a world crawling with monsters, kingdoms rely on System Users, adventurers who can grow stronger faster than anyone else. Novis, one of the most righteous among them, hits disaster when a quest goes horribly wrong, infecting his system and triggering an insatiable thirst for blood. Now a powerful vampire, Novis discovers that the line between human and monster isn’t so clear anymore. Wielding the kingdom’s strongest system, he must navigate a dangerous world where survival and morality constantly clash. Blood System is a gripping Korean action webtoon packed with dark powers, epic battles, and thrilling twists.
29. There Are No Bad Warriors in This World
- Reads: 3.5 million
- Subscribers: 107,161
- Status: Ongoing
- New Episodes: Every Friday
Hyeonseok Choi was at the top of his game as the undisputed MMA heavyweight champion until a truck ends his life. A fairy named Rahel shows up, offering him a chance to fight as a hero in the afterlife, but a little mix-up lands him on the side of the demons instead. Trapped in this new world, Hyeonseok uses his charm and smarts to climb the ranks, slowly realizing that the line between good and evil isn’t as clear as he once thought. There Are No Bad Warriors in This World is full of action, twists, and clever strategy.
30. Absolute Reign
- Reads: 4.3 million
- Subscribers: 133,288
- Status: Ongoing
- New Episodes: Every Monday
Twenty years after the Great War, peace hasn’t brought prosperity, just corruption, theft, and greed spreading through Murim. The world that was once dazzling is now a shadow of its former self. Amidst all this, a young, mysterious swordsman rises, determined to restore Jianghu to its former glory. Facing dangerous enemies and a society full of corruption, he must fight to uphold justice, loyalty, and honor. Absolute Reign is an action-packed Korean webtoon full of epic sword fights, clever strategy, and the journey of a hero trying to reclaim a world where virtue once ruled.
Conclusion
Korean action webtoons are full of intense battles, clever strategies, and unforgettable heroes, making them some of the most exciting stories online. The 30 webtoons we’ve shared are perfect picks for 2025, whether you love martial arts, supernatural powers, or underdogs rising against all odds. So dive in, explore these incredible worlds, and get ready for adventure. Your next favorite webtoon is waiting!
