UniProtKB entry view manual
User manual for the UniProtKB entry view.

UniProtKB flat file manual
User manual for the UniProtKB flat file format.

UniProt XML schemas
XSD files for the UniProt databases.

UniProt RDF schema ontology
OWL file for the UniProt databases.

FASTA headers
Description of FASTA headers for UniProtKB (including alternative isoforms), UniRef, UniParc and archived UniProtKB versions.

UniProtKB query fields
List of supported fields for querying UniProtKB on this website.

Browser support
Recommended list of major web browsers for the UniProt website.

How can I access UniProt programmatically?
UniProt provides several application programming interfaces (APIs) to query and access its data programmatically, e.g. REST, Java API, SPARQL endpoint.

Swissknife
Object-oriented Perl library for parsing the UniProtKB text format.

Varsplic
Perl script to create alternatively-spliced protein sequences derived from UniProtKB entries.