Find the right dataset, understand what it contains, and see the evidence behind its freshness, size and usability before you rely on it.
0source systems
0guided workflows
0identifier concepts
0typed relationships
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START WITH
SQL READY compatible distribution and direct browser access verifiedSQL POSSIBLE compatible distribution; browser access not yet verifiedDOWNLOAD ONLY browser access failed or a conversion/download step is neededNOT TABULAR no directly queryable table-like distributionPreviewable a small sample can be inspected in-browser; this does not guarantee SQL loadingOther downloads PDFs, archives and unsupported files are kept separate and can be filtered outCurated manually assembled from official publisher material; evidence links includedPublisher schema machine-harvested field definitions exposed by the publisherNational DCAT discovered through data.gov.be; direct publisher evidence wins when both existHarvested catalogue metadata; grain not auditedRecord sample actual example rows, never treated as schema
0 sources
NO MATCH
No source matches this combination.
Source-level graph with explicit relationship contracts. An edge can be dataset-scoped, lossy or contextual; connectivity never means universal record-level joinability.
Typed source-relationship graph0 relationships
Runs in your browser. Load files, query them with DuckDB SQL, test join cardinality and inspect duplicate keys before you trust a merge. Local files are not uploaded.
01 / INGEST
Load data
engine idle
Remote URLs are tried directly first. For catalogue CSV/TSV files blocked by CORS, SQL Lab may fetch the complete file through the approved opaque-ID relay when it fits within 8 MiB. Arbitrary URLs are never relayed.
No tables loaded yet.
02 / QUERY
Write a SELECT
Ctrl / ⌘ + Enter to run
The engine loads only when this lab is opened or data is added.
No resultDisplay is capped at 500 rows.
Run a SELECT to see rows here.
03 / JOIN CHECK
Build & test a join
Check cardinality before merging
Load two tables to test match rate, null keys, duplicates and row multiplication.
Duplicate explorer
Show every row whose selected key occurs more than once.
04 / PRACTICAL LIMITS
What stays free
Compute
SQL executes inside DuckDB-Wasm in the visitor's browser. It does not consume Worker CPU.
Local files
Files stay local to the browser session. No upload endpoint is involved.
Remote data
The browser contacts publishers directly first. Catalogue CSV/TSV blocked by CORS can use the complete-file ≤8 MiB relay; larger files stay download/drop only unless direct CORS works.
Engine
DuckDB-Wasm is loaded from jsDelivr on first use, keeping large WASM binaries out of this GitHub repo and Cloudflare assets.
Recommendations here identify source families. Select the exact datasets and distributions in the Dataset Atlas before implementing a pipeline.
Stack checks
0/100 ready
Export project
Saved projects
This compares publishers and access routes; use the Dataset Atlas to inspect individual fields, versions and record-level compatibility.
Find Belgian open data you can trust — Topics, Publishers, FAQ
Find Belgian open data you can trust
One searchable catalogue of about 21,700 Belgian public datasets from federal registers, Flanders, Wallonia, Brussels and city portals — with the evidence you need before you rely on a dataset.
Who published it, under which licence, and who to ask
Whether the download link worked when we last checked, and whether the file really is what it says
Profile a file and run SQL on it inside your own browser — nothing is uploaded
A free catalogue and research tool for Belgian open data. It brings together data.gov.be, regional and city portals and hand-reviewed national registers, and shows evidence about each dataset: publisher, licence, update cycle, contact and link checks.
Is the data correct?
We describe the catalogue, not the numbers inside a dataset. A dataset marked as checked had a download link that answered with the declared format on the date shown. Always read the publisher's documentation before relying on data.
Can I reuse the data commercially?
It depends on the licence. Open licences such as CC BY or CC0 generally allow reuse with attribution. Non-commercial or custom licences have conditions — each dataset page states the licence group and links to the publisher.
Does it cost anything or need an account?
No. There is no account, advertising or tracking. Analysis of files runs in your browser.