{ "schemaVersion": 1, "id": "viewparquet-public-parquet-datasets", "title": "Public Parquet dataset catalog", "description": "A machine-readable companion to viewparquet's public Parquet sample guide. Availability and verification are point-in-time observations, not uptime guarantees.", "sourcePage": "https://viewparquet.com/blog/free-public-parquet-datasets", "lastFullVerificationOn": "2026-06-12", "verificationStatus": "passed_on_date", "lastNetworkProbeOn": "2026-08-19", "networkProbeStatus": "all_passed", "networkProbe": { "datasetCount": 11, "checks": [ "http_success", "confirm_par1_header", "confirm_strict_ranged_par1_footer" ], "result": "All 11 catalog URLs passed the lightweight boundary probe.", "limitation": "The probe did not download and decode every complete file, so it did not advance the full-verification date." }, "verificationMethod": { "scope": "Every listed file was downloaded in full on the verification date.", "checks": [ "follow_redirects_and_reject_http_errors", "confirm_par1_header", "confirm_par1_footer", "duckdb_describe", "duckdb_count", "decode_sample_rows" ], "reproduceWith": [ "bun scripts/verify-public-parquet-datasets.ts", "bun scripts/verify-public-parquet-datasets.ts --network", "bun scripts/verify-public-parquet-datasets.ts --network --duckdb" ], "limitations": [ "Links can change after the verification date.", "The default validator checks the committed catalog only; --network performs lightweight HTTP and Parquet-magic checks, not a full-file decode.", "--duckdb requires a local DuckDB CLI and validates schema and row count through DuckDB's remote reader.", "Browser and DuckDB-WASM compatibility can differ from the native DuckDB CLI.", "Dataset licenses and redistribution terms remain controlled by their providers." ] }, "datasets": [ { "id": "mosaic-flights-200k", "name": "Flights 200k", "provider": "UW Data Lab / Mosaic", "downloadUrl": "https://raw.githubusercontent.com/uwdata/mosaic/main/data/flights-200k.parquet", "rowCount": 231083, "columnCount": 3, "compressedSize": { "display": "1.1 MB", "approximateBytes": 1100000 }, "useCases": ["quick tests", "SQL demos", "browser viewer smoke tests"], "verification": { "status": "passed_on_date", "lastVerifiedOn": "2026-06-12" } }, { "id": "mosaic-flights-10m", "name": "Flights 10M", "provider": "UW Interactive Data Lab", "downloadUrl": "https://idl.uw.edu/mosaic-datasets/data/flights-10m.parquet", "rowCount": 10000000, "columnCount": 7, "compressedSize": { "display": "72 MB", "approximateBytes": 72000000 }, "useCases": ["large-file testing", "query performance experiments"], "verification": { "status": "passed_on_date", "lastVerifiedOn": "2026-06-12" } }, { "id": "nyc-yellow-taxi-2024-01", "name": "NYC Yellow Taxi, January 2024", "provider": "NYC Taxi & Limousine Commission", "downloadUrl": "https://d37ci6vzurychx.cloudfront.net/trip-data/yellow_tripdata_2024-01.parquet", "rowCount": 2964624, "columnCount": 19, "compressedSize": { "display": "48 MB", "approximateBytes": 48000000 }, "useCases": ["realistic analytics", "timestamp and fare analysis"], "verification": { "status": "passed_on_date", "lastVerifiedOn": "2026-06-12" } }, { "id": "nyc-green-taxi-2024-01", "name": "NYC Green Taxi, January 2024", "provider": "NYC Taxi & Limousine Commission", "downloadUrl": "https://d37ci6vzurychx.cloudfront.net/trip-data/green_tripdata_2024-01.parquet", "rowCount": 56551, "columnCount": 20, "compressedSize": { "display": "1.3 MB", "approximateBytes": 1300000 }, "useCases": ["small realistic data", "timestamp and fare analysis"], "verification": { "status": "passed_on_date", "lastVerifiedOn": "2026-06-12" } }, { "id": "duckdb-taxi-2019-04", "name": "DuckDB Taxi, April 2019", "provider": "DuckDB", "downloadUrl": "https://blobs.duckdb.org/data/taxi_2019_04.parquet", "rowCount": 7433139, "columnCount": 18, "compressedSize": { "display": "121 MB", "approximateBytes": 121000000 }, "useCases": ["large-file testing", "NYC taxi analytics"], "verification": { "status": "passed_on_date", "lastVerifiedOn": "2026-06-12" } }, { "id": "duckdb-dutch-train-services", "name": "Dutch Train Services", "provider": "DuckDB", "downloadUrl": "https://blobs.duckdb.org/train_services.parquet", "rowCount": 380959, "columnCount": 8, "compressedSize": { "display": "1.5 MB", "approximateBytes": 1500000 }, "useCases": ["time-series SQL", "window functions"], "verification": { "status": "passed_on_date", "lastVerifiedOn": "2026-06-12" } }, { "id": "teradata-userdata1", "name": "userdata1", "provider": "Teradata Kylo", "downloadUrl": "https://github.com/Teradata/kylo/raw/master/samples/sample-data/parquet/userdata1.parquet", "rowCount": 1000, "columnCount": 13, "compressedSize": { "display": "111 KB", "approximateBytes": 111000 }, "useCases": ["mixed-type schemas", "small-file inspection"], "verification": { "status": "passed_on_date", "lastVerifiedOn": "2026-06-12" } }, { "id": "apache-alltypes-plain", "name": "alltypes_plain", "provider": "Apache Parquet", "downloadUrl": "https://github.com/apache/parquet-testing/raw/master/data/alltypes_plain.parquet", "rowCount": 8, "columnCount": 11, "compressedSize": { "display": "1.8 KB", "approximateBytes": 1800 }, "useCases": ["primitive type coverage", "reader edge cases"], "verification": { "status": "passed_on_date", "lastVerifiedOn": "2026-06-12" } }, { "id": "hugging-face-imdb-train", "name": "IMDB reviews, train split", "provider": "Hugging Face / Stanford NLP", "downloadUrl": "https://huggingface.co/datasets/stanfordnlp/imdb/resolve/refs%2Fconvert%2Fparquet/plain_text/train/0000.parquet", "rowCount": 25000, "columnCount": 2, "compressedSize": { "display": "20 MB", "approximateBytes": 20000000 }, "useCases": ["long text", "NLP workloads"], "verification": { "status": "passed_on_date", "lastVerifiedOn": "2026-06-12" } }, { "id": "hugging-face-squad-train", "name": "SQuAD, train split", "provider": "Hugging Face / Rajpurkar et al.", "downloadUrl": "https://huggingface.co/api/datasets/rajpurkar/squad/parquet/plain_text/train/0.parquet", "rowCount": 87599, "columnCount": 5, "compressedSize": { "display": "13.8 MB", "approximateBytes": 13800000 }, "useCases": ["nested structures", "question-answering data"], "verification": { "status": "passed_on_date", "lastVerifiedOn": "2026-06-12" } }, { "id": "geoparquet-project-example", "name": "GeoParquet example", "provider": "GeoParquet project", "downloadUrl": "https://github.com/opengeospatial/geoparquet/raw/main/examples/example.parquet", "rowCount": 5, "columnCount": 6, "compressedSize": { "display": "28 KB", "approximateBytes": 28000 }, "useCases": ["GeoParquet table inspection", "reader compatibility"], "notes": [ "The native DuckDB verification passed on the stated date; browser and client support for newer geometry logical types varies." ], "verification": { "status": "passed_on_date", "lastVerifiedOn": "2026-06-12" } } ] }