BlazBlue may refer to:
- BlazBlue (Franchise), the fighting game franchise published by Arc System Works
- BlazBlue (Manga), the manga adaptation of BlazBlue: Calamity Trigger, the first game in the BlazBlue series
- Azure Grimoire, the grimoire that Ragna the Bloodedge possesses in the C-series
- Blue Grimoire, the grimoire that Hazama possesses in the C-series