Posterior Labs / Explore

DuckDB-WASM Explorer

Run quick SQL against Parquet snapshots directly in the browser. Same-origin URLs avoid CORS surprises.

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Diagnostics

Offline cache

Off

Backend

Storage usage

Persistent storage

Manifest cache

Pack hash

Cache hits

Cache misses

Last updated

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Data source

Same origin preferred

Parquet URL Use the Pages /data/ route to skip CORS. Curated dataset packs

Curated packs load from /explore/packs/manifest.json (fallback: datasets.json). Or upload a local Parquet file Files stay in this browser tab.

Results capped

Starter query

Memory

Memory limit

DuckDB-WASM is single-threaded here and memory-limited (WASM max ~4GB). The limit is not a hard cap; some allocations can exceed it.

Rows capped to 200

No results yet.

Market timeline

Query daily snapshots for a market id once the history pack is available.

Market ID

View in Evidence

History pack not available yet.

Overlay

Compare two markets over the last 30 days (requires the history pack).

Market A Market B

History pack not available yet.