Harlequin

harlequin

Easy, fast, and beautiful database client for the terminal

Runs as harlequin|macOS, Linux, Windows|harlequin.sh

Open form in Otty otty.toml

Command form

ai-draft · 2 tasks · 3 fields

Open one or more database files or connection strings with a chosen adapter. Adapter-specific options are left out.

Opens the form; the finished command lands at your prompt, unrun

Run in Otty

otty gui harlequin

Open databasesExample values, fixed in this page — nothing here reaches a terminal

Basic

Database files or connection strings*

string

Read-only

--read-only

TasksEach one presets the form for one job

Open DuckDB file

connectionsread_only

Open SQLite file

adapterconnectionsread_only

ParametersOnly these flags are editable in the form

Adapter

string

--adapter-aduckdbsqlite

Read-only

boolean

--read-only

Database files or connection strings

Leave empty for an in-memory database.
string · positional 0 · repeatable

SourcesEvery flag above is checked against these

docs

harlequin "path/to/duck.db" "another_duck.db" harlequin --adapter sqlite harlequin -a sqlite "path/to/sqlite.db" "another_sqlite.db" `--read-only` connects in a mode the database refuses writes in Harlequin takes `--read-only` too.

manualmain 2026-10

github.com

Before it fills your prompt, Otty checks the installed harlequin against its version. A form that does not match your version is not offered.