What is webSQL.org?

webSQL.org is a free, browser-based SQL workbench for loading, exploring, and manipulating data — no installation, no account, and no server required.

It's free because it's built on PGlite, an open-source WASM build of Postgres. There's no backend to pay for and no database instance to provision — the entire Postgres engine runs as WebAssembly directly inside your browser tab.

Because everything runs client-side, your data never leaves your machine unless you explicitly export or share it. Upload a CSV, Excel file, SQL dump, or .tar database snapshot, and query it immediately with full SQL — joins, views, window functions, and all.

A few things to know

• Single-user by design. Since the database lives inside one browser tab's memory, webSQL.org does not support multi-user concurrency, simultaneous connections, or shared live sessions. It's a personal sandbox for one person working with one dataset at a time, not a hosted multi-tenant database.
• Ephemeral unless you save it. Data lives in the browser session. Download your database when you want to keep it or hand it off to someone else.
• Built for exploration. It's meant as a lightweight place to pull in a dataset, run some SQL against it, look at an ERD, and move on — not as a production database or an app backend.

In short: webSQL.org gives you a real Postgres engine, for free, entirely in your browser — great for quick data exploration, teaching SQL, and one-off analysis, but not a substitute for a proper multi-user database server.

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