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Free Sample Scientific & Statistical Data Files

Download free sample scientific and statistical data files in Parquet, HDF5, NumPy (.npy/.npz), Avro, ORC, Feather, ARFF, NetCDF, MATLAB, R (RData/RDS), Stata, SPSS, and JSON Lines formats — dummy datasets for testing data pipelines, notebooks, and analytics tools.

Choose a Format

Pick a format below to see downloadable samples.

ARFF (Weka)

8 sample files available

View ARFF (Weka) Samples →

Apache Avro

8 sample files available

View Apache Avro Samples →

Stata (.dta)

8 sample files available

View Stata (.dta) Samples →

Feather

8 sample files available

View Feather Samples →

HDF5 (.h5)

8 sample files available

View HDF5 (.h5) Samples →

JSON Lines (.jsonl)

8 sample files available

View JSON Lines (.jsonl) Samples →

MATLAB (.mat)

8 sample files available

View MATLAB (.mat) Samples →

NetCDF (.nc)

8 sample files available

View NetCDF (.nc) Samples →

NumPy Array (.npy)

8 sample files available

View NumPy Array (.npy) Samples →

NumPy Archive (.npz)

8 sample files available

View NumPy Archive (.npz) Samples →

Apache ORC

8 sample files available

View Apache ORC Samples →

Apache Parquet

8 sample files available

View Apache Parquet Samples →

R Data (.RData)

8 sample files available

View R Data (.RData) Samples →

R Data (.rds)

8 sample files available

View R Data (.rds) Samples →

SPSS (.sav)

8 sample files available

View SPSS (.sav) Samples →

Built for testing data-engineering and data-science tooling specifically — columnar formats (Parquet, ORC, Feather, Avro) for big-data pipelines, and stats-package formats (RData, RDS, .dta, .sav, .mat) for cross-tool data exchange.