Dev tools · September 19, 2023
Harlequin, the DuckDB IDE for Your Terminal
Hi HN - For the past four months I've been working (part-time, this is OSS after all) on Harlequin, a SQL IDE for DuckDB that runs in your terminal. I built this because I work in Data, and I found myself often reaching for the DuckDB CLI to quickly query CSV or Parquet data, but then hitting a wall when using the DuckDB CLI as my queries got more complex and my result sets got larger. Harlequin is a drop-in replacement for the DuckDB CLI that runs in any terminal (even over SSH), but adds a browsable data catalog, full-powered text editor (with multiple buffer support), and a scrollable…
Harlequin, the DuckDB IDE for Your Terminal launched on September 19, 2023 with 5 votes, #1,754 of 4,228 launches that month and more than 50% of that year's launches. The site was still online in September 2026, 3 years on.
What it does
The SQL IDE for Your Terminal. Contribute to tconbeer/harlequin development by creating an account on GitHub.
In the maker’s words, at launch
Hi HN - For the past four months I've been working (part-time, this is OSS after all) on Harlequin, a SQL IDE for DuckDB that runs in your terminal. I built this because I work in Data, and I found myself often reaching for the DuckDB CLI to quickly query CSV or Parquet data, but then hitting a wall when using the…
Does a similar job
all alternatives →- DUDuck-UI – Browser-Based SQL IDE for DuckDB2025 · demo.duckui.com · ▲213
I built Duck-UI, a web-based SQL editor that runs DuckDB entirely in your browser via WebAssembly. No backend required. The Problem: Every time I needed to query csv, parquet, or even to play with SQL, I had to either: (a) spin up a Jupyter notebook (b) use the CLI (c) upload to a hosted service. Friction at every step (TOO MUCH to load a csv or even to test some sql (study)... The Solution: DuckDB's WASM runtime lets us run SQL analysis client-side. Load CSV/JSON/Parquet files from disk or URL, write SQL, get results instantly. Data stays on your machine. What It Does: SQL editor…
SQL workbench in the browser2024 · sql-workbench.com · ▲117Free browser-based SQL editor powered by DuckDB. Query and visualize CSV, JSON, Parquet and Arrow files locally or from remote URLs. No installation required.
- CQCSVFiddle – Query CSV files with DuckDB in the browser2022 · csvfiddle.io · ▲64
Import CSVs, write SQL, and instantly share it with anyone. Runs 100% in-browser, so you're in control of your data.
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Source: Show HN post ↗ · launch text quoted in part
