Show HN: Query Jsonl in the Browser (DuckDB‑WASM) with Markdown Preview

I got tired of reading raw markdown strings inside JSON files (which often happens in AI benchmarks, evals, logs, etc.) so I created https://ad-hoc-lens.dev.

It's a client-only web app built on top of DuckDB-WASM that can query those JSON files and render the returned string as markdown.

OSS Repo: https://github.com/jsimonrichard/ad-hoc-lens

Features: - JSON(L), TSV, CSV, and Parquet files are all supported - Strings annotated with the `md(...)` macro will be rendered as markdown - The data you upload never leaves the tab

I'd love to hear your feedback, especially on - the general user experience - performance limits - any features that would make your life better!

You can respond here or create an issue on the GitHub repo.