Google Dataset Search
datasetsearch.research.google.com
Finds published datasets across repositories, governments and journals
No sign-up
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kaggle.com
Community-uploaded datasets with notebooks showing how people used them.
Hundreds of thousands of datasets, each with a discussion tab and public notebooks where other people have already loaded and plotted it — which is often more useful than the data itself when you are deciding whether it is worth your afternoon. Free GPU-backed notebooks run in the browser on a weekly quota. Quality varies enormously because anyone can upload, and licence and provenance are frequently vague or copied from somewhere else.
Questions
Free to use, but you have to register before it will do the job. Downloads need an account, and uploaded datasets often have unclear provenance or licensing.
Yes. Kaggle Datasets sends your input to its own servers to process it. That is fine for public material; for anything containing personal data, use one of the on-device tools instead.
Downloads need an account, and uploaded datasets often have unclear provenance or licensing.
Alternatives
Same category or same task, ordered by how closely they overlap.
datasetsearch.research.google.com
Finds published datasets across repositories, governments and journals
ourworldindata.org
Long-run global data on health, energy and poverty, free to reuse
datablist.com
Spreadsheet built for cleaning and deduplicating messy list exports
datawrapper.de
Turns a pasted table into a publication-quality chart in four steps
db-fiddle.com
Run a schema and a query against real MySQL, Postgres or SQLite
shell.duckdb.org
Run SQL over your own CSV or Parquet file without uploading it