PalSphere's breeding calculator covers 288 breedable Pals and 257 unique fusions extracted from Palworld 1.0. Plan parent pairs, reverse-look up every combo for a target, run Pathways from your box, and simulate Mutated Eggs. PalSphere.app is the web Palworld database and tools site (not the unrelated mobile app that shares a similar name).
Quick answer
Pick two parents to see the child, or pick a target Pal to list every valid parent pair. Results use live 1.0 CombiRank, unique fusions, and same-species rules.
Child rank ≈ floor((parentA + parentB + 1) / 2), then the game picks the closest eligible breedable Pal. Unique fusions ignore that average. Same-species-only Pals (many legendaries) only hatch from two of themselves once you own the first copy.
Every how-to-breed and combinations-with page for breedable Pals. Use the calculator above for live pairs; use these links for crawl and deep links.