PDB to CIF converter

Convert PDB protein structure files to CIF format for crystallographic applications. Upload a PDB file or paste the structure data below.

Input (PDB format)

PDB

Or fetch by PDB ID

Enter a 4-character PDB ID to fetch the structure from RCSB database

Click to upload or drag and drop

PDB file (.pdb, .ent)

Max size: 50MB

Advanced conversion options

Chain selection

All chainsSpecific chains

Atom inclusion options

Include hydrogen atomsInclude heteroatoms (ligands, water, etc.)

CIF format options

Include secondary structure informationInclude temperature factors (B-factors)Include occupancy valuesUse compact formatting (reduced whitespace)

Output (CIF format)

CIF