They’re sometimes called symbol files.

Some PDB files might instead be in the Protein Data Bank file format.

These are plaintext filesthat store coordinates regarding protein structures.

Screenshot of several PDB files in Windows 10 that open with Notepad

Yet another format that uses this same extension is Tanida Demo Builder.

Some other compatible viewers and editors includeNotepad++andBrackets.

Visual Studio expects to see a PDB file in the same folder as the DLL or EXE file.

you might view and edit Protein Data Bank files in Windows, Linux, and macOS withAvogadro.

These programs can pop crack open the file, too:Jmol,RasMol,QuickPDB, andUSCF Chimera.

To open a PalmDOC PDB file, trySTDU Viewer.

Tanida Demo Builderopens files in that format.

Protein Data Bank files can be converted to other formats withMeshLab.

To convert one to the FASTA format can be done withMeiler Lab’s online PDB to FASTA converter.

It’s also possible to save this file to CIF (Crystallographic Information format) online usingPDBx/mmCIF.

Still Can’t Open It?

Files that aren’t opening with any of the tools from above, probably aren’t actually PDB files.

PBD is another that belongs to theEaseUS Todo Backupprogram and is therefore only useful when opened with that software.

There’s more to learn about Protein Data Bank files, too; seeWorldwide Protein Data BankandRCSB PDB.

Go to Tools > Options > Debugging > Symbols and select Microsoft Symbol Servers.

Use a third-party file reader.Download the Cool Reader appor any other PDB file-supported reader on Google Play.