| name | auth | type | notes |
|---|---|---|---|
| arXiv | none | texts · science · preprints | Open access scientific scholarly articles |
| Chronicling America | none | newspapers · texts · historical · us | Historical US newspapers (full text) |
| DPLA | free key | cultural · texts · images · us | Cultural heritage data from thousands of US institutions |
| Europeana | free key | cultural · images · search | Cultural heritage data from thousands of European institutions |
| GeoNames | free account | geography · place-names · global | Free geographical database |
| Harvard Art Museums | free key | art · images · metadata | The Harvard Art Museums API (rich provenance data) |
| Internet Archive | none | texts · audio · video · search | Internet Archive Developer Portal (full-text search, media access) |
| Library of Congress | none | texts · photos · maps · government | Newspapers, photos, maps |
| Met Museum | none | art · images · metadata | The Metropolitan Museum of Art Collection API |
| NASA | none / free key | space · images · science | NASA API portal (images, earth data, etc) |
| Open Library | none | books · metadata · covers | Book discovery and lookup services |
| Open Notify | none | space · real-time | NASA’s open data (ISS location, astronauts in space, etc) |
| OpenAlex | none | academic · metadata · global | Comprehensive index of the world's research |
| Openverse | free key | images · audio · cc-licensed | Openly licensed images & audio |
| Overpass API | none | geography · maps · osm | Query OpenStreetMap data programmatically |
| PubChem | none | science · chemistry · compounds | Open chemistry database |
| Rijksmuseum | free key | art · images · dutch | Full museum collection with high-res images |
| Trefle | none | science · botany | Botanical data source and REST API (1M+ plant species) |
| Wikidata | none | structured · knowledge · global | Free knowledge base, SPARQL endpoint |
| Wikimedia | none | texts · images · encyclopedic | Commons, Wikipedia, Wikidata |
| name | type | notes |
|---|---|---|
| Awesome Public Datasets | meta-list · general | List of public datasets by domain |
| CERN Open Data | science · physics | Particle physics data from LHC experiments |
| Common Crawl | web · corpus · large-scale | Open repository of web crawl data |
| Copernicus Climate Data Store | science · climate · environmental | Information about the Earth's past, present and future climate |
| Free GIS Data | geography · maps | Comprehensive directory of free GIS datasets |
| GDELT Project | events · news · global · real-time | World's broadcast, print, and web news |
| Global Biodiversity Information Facility | science · biology · species | Open access to biodiversity data |
| Google Dataset Search | meta-search · general | Search engine across public datasets |
| Humanitarian Data Exchange | humanitarian · social · global | Open data platform for humanitarian data |
| Kaggle Datasets | general · ml | Community-shared datasets across multiple domains |
| Open Humans | science · health · personal | Open human health and genomics data |
| OpenStreetMap | geography · maps · global | Fully open collaborative map data |
| Our World in Data | social · economics · global | Research and data on global development |
| Trefle | science · botany | Botanical data source and REST API (1M+ plant species) |
| UCI ML Repository | ml · general · academic | Collection of databases used by the machine learning community |
| UN Data | social · economics · global | UN statistical databases |
| Wikidata | knowledge · structured · global | Linked open data knowledge base |
| Wikipedia Data Dumps | texts · knowledge · corpus | Full Wikipedia database as downloadable datasets |
| World Bank Open Data | economics · global | Global development indicators, country-level data |
| Zenodo | science · research · academic | Open repository for EU-funded research outputs |
Random images from Wikimedia Commons.
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public-domain.club is an archive of free information; datasets, texts, images, archives, and apis that are either in the public domain, openly licensed, or freely accessible without restriction.
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