Jack-Knife is a heavy metal band from the United Kingdom that delivers aggressive, hard-hitting metal with a no-frills approach. Their stripped-down style channels the raw energy of classic British heavy metal traditions.

Jackal is a heavy metal band from Denmark that delivers aggressive, riff-driven metal with a raw and uncompromising edge. Their Danish take on extreme metal channels the cold intensity of Scandinavian heavy music traditions.

Jackal-Headed Guard of the Dead is a doom metal band from Edinburgh, Scotland, whose name and aesthetic draw on ancient Egyptian necromantic imagery. Their releases including Grimoire, Exaanum, and The Sky Has Been Riven channel deliberately ominous and extreme doom metal steeped in dark mysticism.

Jackknife Seizure is a progressive metal band from London blending grunge, progressive, and hard rock influences into a distinctive heavy sound. Described as the love-child of Mastodon and The Doors, their albums Starfisher (2017) and Time of The Trilobites feature eccentric vocals, space-themed lyrics, and complex progressive riffs.

Jacknife Holiday is a sludge and stoner metal band from the United Kingdom whose releases including Still Stinkin Still Drinkin (2014) deliver grimy, fuzz-drenched heaviness. Their raw, unpolished approach to sludge metal channels the genre's abrasive spirit through punishing riffs and caustic energy.

JackRebel is a Ukrainian metal band playing what they call Iron Rock n Roll, whose work has been deeply affected by the ongoing war in their country. Their discography from Drink & Fight (2014) through JackRebel on Tour (2024) channels defiant energy with explicit support for Ukrainian troops, describing themselves as aged and hardened under the conditions of the largest rock and roll show of our time.

Jackstraw is a heavy metal band from Italy whose compositions deliver aggressive, riff-driven metal with a modern edge. Their work contributes to the vibrant Italian metal scene with technically proficient and intense heavy music.

Jacobs Moor is a progressive power/thrash metal band from Vienna, Austria, formed in 2014. They have released several albums including Anthems For The Apocalypse and All That Starts, blending technical proficiency with aggressive thrash energy and progressive structures.

Jaded Heart is a melodic metal and hard rock band from Germany with a career spanning multiple decades of the European melodic metal scene. Known for their polished songwriting and soaring vocal performances, they have built a loyal following through consistent albums blending power metal melodies with hard rock accessibility.