The Best HITRAN online Alternatives in 2026

ACE Science Center offers data and plots from the spacecraft, with browse, download, and documentation sections.

Browse Kurucz atomic line lists alongside links to related astronomy and molecular databases.

Canada’s National Earthquake Database combines raw seismograph data, measurements, and derived parameters from national seismic networks.

CDMS provides reference data for molecular spectroscopy, with database records and guidance on their content and citation.

FRED is a freshwater research and environmental database with search and map views for study sites, samples, parameters, and species groups.

NIST’s Atomic Spectral Line Broadening Bibliographic Database provides references about atomic spectral line broadening, from 1889 onward.

NONCODE brings together non-coding RNA sequences, documentation, annotations, expression, and disease relationships in a knowledge database.

The Cross-National Equivalent File harmonizes variables across household panel surveys and provides researchers access to comparable cross-national data.

Leibniz SAFE’s data center addresses access to company-level and cross-European datasets for economic research.

The Monarch Initiative integrates and aligns cross-species data on genes, genotypes, variants, diseases, and phenotypes.

OPEN-ADAS lets users search atomic data by element, ion, wavelength, or other parameters.

UniProtKB/Swiss-Prot is the reviewed section of UniProtKB, with manually annotated protein sequences and experimental information.

The Karlsruhe Cloud Atlas describes cloud types and weather phenomena through photographs and text, with sections on cloud classification and coding.

Pathway Commons provides access to data integrated from public pathway and molecular interaction databases.

WURM catalogs computed mineral properties, including crystal structures, calculation parameters, and spectral measurements.

Query the ATNF Pulsar Catalogue by selecting pulsar parameters and predefined variables.

The Census Bureau's TIGER/Line page provides access to mapping files from its Geography program.

Reciprocal Net links a distributed crystallography network with a searchable collection of common molecular structures.

The Gene Ontology project represents knowledge about gene functions across molecular, cellular, and tissue system levels.

PHI-base curates molecular and biological information on genes affecting pathogen-host interactions and some anti-infective targets.

Search cell-line records in Cellosaurus, an encyclopedia and catalog of cell lines.

The Atomic Line List compiles calculated wavelengths for allowed, intercombination, and forbidden atomic transitions.

China’s cell line resource platform lets users search human, animal, and insect cell information and related resource services.

GENCODE identifies and classifies human and mouse genes, with release information, data access guidance, and documentation.