Quick answers
Who counters Jax in Wild Rift?
In the matchup data documented in Rift Lab, these are the harder matchups for Jax: Malphite (Baron / Top), Poppy (Baron / Top), Kennen (Baron / Top), Teemo (Baron / Top), Jayce (Baron / Top). This is a documented matchup list, not a win rate: TheNexus does not publish win-rate or pick-rate figures it cannot source.
How do you play against Jax in Wild Rift?
Riot's ability text for Jax describes crowd control (a stun, root, knock-up, pull or similar) in Counter Strike (ability 3); a dash, leap or blink in Leap Strike (ability 1), Empower (ability 2). Plan around those abilities before a trade or a fight. These notes are keyword matches over the ability text only, not a rating of how strong Jax is, so read the full descriptions on this page.
What is the best build for Jax in Wild Rift?
The Nexus-reviewed core build for Jax, in purchase order: Dusk and Dawn then Blade of the Ruined King then Riftmaker then Gluttonous Greaves. Runes: Grasp of the Undying, Demolish, Second Wind, Overgrowth, Last Stand. Situational swaps: against enemy shields: Oceanid's Trident; against enemy crowd control: Mercury's Treads; against enemy burst: Bone Plating. This is a reviewed snapshot (patch 7.2b), not a build ranked by win rate.
Which lane and role does Jax play in Wild Rift?
Jax is a Fighter by Riot's classification and is played in Baron / Top. Riot rates the difficulty Medium. On our tier-list snapshot (patch 7.2b) it shows S tier from its external source, which is a snapshot letter and not a TheNexus win rate.
Every answer here is built from Rift Lab data and Riot's own ability text. Where the data is missing we say so instead of guessing.