What is a .BSP file?
BSP is a compiled 3D game level, used by Quake, Half-Life and Source games.
- Did you know
- BSP (Binary Space Partitioning) maps let 1990s engines render complex levels fast.
- Binary space partitioning was first brought to a commercial game by id Software’s John Carmack for Doom, letting it render levels far faster.
- Because building the BSP tree is slow, it is computed once when the level is compiled, which is why classic map geometry cannot move at runtime.
- What Analyser reads
- Inspect game ROMs, patches and engine assets: iNES/NES2.0, Game Boy/Color/Advance, SNES, Nintendo DS/DSi, Nintendo 64, and Sega Genesis ROM headers (title, mapper, region, checksum); IPS/BPS/UPS/PPF patches; Doom WAD lumps; Minecraft NBT/schematics and Bedrock bundles; Aseprite sprites; Godot .pck; Quake/id Tech PAK/PK3; Source BSP/VPK/VTF/VMT; KTX/KTX2 textures; Tiled maps; LÖVE games; PICO-8 carts - plus MPQ, 3DS/Switch and Ren’Py/RPG Maker identification.
- Depth of analysis
- .BSP is an identification-grade format: Analyser recognises it from its bytes and decodes the header metadata it carries, rather than opening it in a full viewer. Formats that do get a full viewer are marked "Full" on the formats page.
- Open a .BSP file
- Drag a .BSP file onto the Analyser home page (or tap to pick one). It is identified entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.