I've had success using sql.js (https://sql.js.org https://sql.js.org) for small, hobby projects. It's just SQLite compiled to WASM. They have a link to an onlin

I've had success using sql.js (https://sql.js.org https://sql.js.org) for small, hobby projects. It's just SQLite compiled to WASM. They have a link to an online demo at the top of the homepage, which may be the exact tool that you're hoping for.