What is a .PD_ file?
.PD_ is a Unity / IL2CPP file (Games). Analyser identifies a .PD_ file and reads the metadata in its header, right in your browser.
- Did you know
- A .pd_ file is internal data Unity writes into its Library cache while importing a project's assets.
- Library cache files are derived data - Unity rebuilds them from the originals, so they are excluded from version control.
- Keeping generated data in the Library lets Unity reimport only what changed, speeding up large projects.
- What Analyser reads
- Identify and read Unity engine files, including IL2CPP-compiled games: the IL2CPP symbol map (.usym - version, symbol count) and global-metadata.dat (magic-gated - metadata version, mapped to a Unity release), Addressables binary catalogs (catalog.bin, content-gated) and their catalog.hash, ShaderLab shaders (.shader) and shader variant collections (.shadervariants), asset bundle manifests (core_assets.manifest), renamed .NET metadata blobs (.pd_ - BSJB runtime version) and House Flipper photo thumbnails (.hfthumb - JPEG wrapped, re-openable as an image). Plus generic hash/checksum text (.hash).
- Depth of analysis
- .PD_ 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 .PD_ file
- Drag a .PD_ 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.
- Related formats
- .USYM · .SHADERVARIANTS · .SHADER · .HFTHUMB · .HASH. See all supported file types.