One lab, every gear question
Profile paste to raid-ready answer.
Quick sims, bag searches, drop calls, and rotation work all share the same engine, so results stay fast and comparable.
Drop Optimizer
Score any loot drop against your active build before you pass on it.
Open Drop OptimizerIn your browser
Full engine, no queue.
The whole simulator compiles to WebAssembly and runs in your browser. Your CPU is the worker, so sims finish in seconds without waiting in a queue.
Instant. No queue, no slot pool. Click run, get a number.
Saved. Every run saves to your account. Re-open last week's sim, compare gear sets, share a link.
Non-blocking. Keep a tab open, sim while you're reading. It does not block the UI.
For your guild
Discord bot scores every drop.
Boss drops an item. The bot tells you who it's an upgrade for, ranked by DPS gain, before anyone rolls.
Instant pass calls. One command posts upgrade rankings for the whole raid.
One roster. Every character's profile is kept in sync with one command.
Auditable. Every roll is archived with the math that backed it.
Companion addon
Your loadouts, in the game.
Export your character to WoW Lab, sim it, and build a loadout, then pull that loadout straight back into the game. Wishlist your drops and snapshot your progress along the way.
Loot roll highlight. Mark items you want by dungeon, boss, or link. When one drops in a Group Loot, the matching frame gets an accent border so you don't miss it.
Equip from your bags. Pick an imported loadout, hit Equip Recommended. The addon pulls items from your bags into the right slots and reports anything missing in chat.
SimC round-trip. Export a clean SimulationCraft profile. Paste it into raidbots, any external sim, or back into WoW Lab as a switchable loadout.
Open source
Read the code that runs the numbers.
The engine, the site, the Discord bot. All of it on GitHub. PolyForm Noncommercial license.
Nothing hidden. Every formula and assumption is documented.
You can contribute. File an issue. Send a pull request. Fork it.
Minimal tracking, no ads. No third-party trackers. No selling your data. Ever.