Windows
Compatible applications
Quick Facts
Basic information about this file format
Extension
.PDB
File Type
Protein Data Bank File
Category
Data
Best first step
Use compatible software
Quick Summary
A practical overview of the .pdb file format
The PDB (Protein Data Bank) file format is a standard text-based file format used to store the three-dimensional structural data of biological molecules, primarily proteins, nucleic acids, and complex assemblies. Developed by the Protein Data Bank, this format provides a detailed record of atomic c…
File extension
.PDB
File type
Protein Data Bank File
Category
Data
Recommended action
Open with a trusted compatible app
How to open a .pdb file
Start with a trusted app that supports this format
- Check the file extension carefully and confirm that the file name really ends with .pdb.
- Use software that supports this file type. If one app does not work, try another compatible program for the same platform.
- Update the application if the file was created by a newer version of the software.
- Scan files from unknown sources before opening them, especially documents, archives, scripts, installers, and executable files.
What is a .pdb file?
File extension details and usage information
The PDB (Protein Data Bank) file format is a standard text-based file format used to store the three-dimensional structural data of biological molecules, primarily proteins, nucleic acids, and complex assemblies. Developed by the Protein Data Bank, this format provides a detailed record of atomic coordinates, including the X, Y, and Z positions of each atom within a molecule, as well as information regarding residue names, chain identifiers, and secondary structure assignments like alpha-helices and beta-sheets. Because proteins are dynamic and complex, the PDB format serves as the universal language for structural biologists, bioinformaticians, and pharmaceutical researchers. It allows scientists to visualize molecular interactions, perform docking simulations for drug discovery, and analyze the folding patterns that dictate biological function. While newer formats like mmCIF have been introduced to handle the increasing size and complexity of modern structural data, the PDB format remains the most widely supported and historically significant format in the field of computational biology.
Software Compatibility
Programs that may open or work with .pdb files
macOS
Compatible applications
Linux
Compatible applications
Mobile
Mobile applications
Can .pdb files be converted?
Options for saving or exporting this file to another format
In many cases, a .pdb file can be converted by opening it in compatible software and using an option such as Save As, Export, or Convert. The available output formats depend on the file type and the application used.
- Use the original software that created the file when possible.
- Check whether the application supports exporting to common formats.
- Be careful with online converters when working with private, business, or sensitive files.
- If conversion fails, the file may be corrupted, incomplete, encrypted, or not actually a .pdb file.
Why can't I open a .pdb file?
Common reasons this file type may not open correctly
Wrong software
The file may require a specific program that supports the .pdb format.
Incorrect extension
The file extension may have been renamed manually, even though the actual file format is different.
Corrupted file
The file may be incomplete, damaged during download, or transferred incorrectly.
Outdated app
Your software may need to be updated before it can open newer versions of this file format.
Frequently Asked Questions
Common questions about .pdb files
To open a .pdb file, use software that supports this file format.
- PyMOL
- ChimeraX
- VMD
- RasMol
- MacPyMOL
Open the file in compatible software and look for options such as Save As, Export, or Convert. If no export option is available, the file may require a specialized converter or the original application that created it.
- Verify that the file extension is correct.
- Install or update compatible software.
- Try another application that supports this format.
- Check whether the file is corrupted, incomplete, or encrypted.
A file extension alone does not guarantee whether a file is safe or unsafe. Only open files from trusted sources, scan unknown files before opening them, and be especially careful with executable, script, archive, and document files.
File safety tips
Use caution with unknown files
Only open files from trusted sources. Before opening a .pdb file, scan it with antivirus software, verify that the file extension is expected, and avoid running unknown executable, installer, macro-enabled document, or script files.