What languages does Windmill support?

TypeScript, Python, Go, Bash, SQL, and GraphQL.

Does Windmill auto-generate UIs?

Yes. Every script gets an auto-generated form UI based on its parameters.

Does Windmill support scheduling?

Yes. Cron scheduling for any script or workflow.

Does Windmill have approval flows?

Yes. Add human approval steps to automated workflows.

Can I self-host Windmill?

Yes. Docker deployment with no usage limits.

Does Windmill support webhooks?

Yes. Trigger any script via webhook for event-driven execution.

How does Windmill compare to n8n?

n8n is visual-first automation. Windmill is code-first with auto-generated UIs. n8n for non-developers. Windmill for developers.

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Windmill — Open-Source Alternative to Retool for Internal Tools and Scripts

Windmill is an open-source platform for building internal tools, workflows, and scripts. Write in TypeScript, Python, Go, or SQL — Windmill provides the UI, scheduling, approval flows, and execution infrastructure. Think Retool meets Temporal.

Scripts With Superpowers

Every script gets an auto-generated UI, scheduling, webhooks, approval flows, and error handling. Write a Python script that queries your database, add a schedule, and you have a production-ready internal tool.

Flow Editor

Visual workflow builder chains scripts together with conditional logic, loops, error handling, and approval steps. Complex multi-step processes without orchestration code.

Windmill vs Retool

Retool builds internal tools with drag-and-drop UI. Windmill builds them from code with auto-generated UIs. Retool for UI-heavy tools. Windmill for script-heavy workflows and automations.