Protein Viewer

Start a structure analysis

Explore protein structures, contacts, ligands, and confidence in one browser workspace. Start with a structure file, PDB ID, AlphaFold accession, or sample structure.

Local-first: all metrics run on CPU with no models, results stay cached in your browser, and the backend stores nothing. On this hosted site your structure is sent to the backend only to be analysed and returned; self-host the backend to keep structures entirely on your machine.

Example Gallery

Hemoglobin

RCSB 2HHB

Classic multi-chain experimental structure for chain metadata and inter-chain contacts.

RCSBexperimentalmulti-chain

Ligand-bound protein

RCSB 1A3N

Experimental structure useful for ligand interaction summaries and residue contact review.

RCSBligandcontacts

Binder–target interface

RCSB 1PPE

Trypsin bound to BPTI — a textbook 2-chain protease–inhibitor complex with a tight, well-characterised interface.

RCSBinterfaceprotein-protein

AlphaFold prediction

AlphaFold DB P69905

Predicted hemoglobin alpha-chain model with pLDDT confidence coloring and contact warnings.

AlphaFoldpLDDTpredicted