ToolJet — Open Source Low-Code Platform for Business Apps

What it is

ToolJet is an open-source low-code platform for building internal tools, dashboards, and business applications. It provides a drag-and-drop visual app builder, workflow automation, AI integration, and connects to over 30 data sources out of the box.

ToolJet is designed for developers and ops teams who need to ship admin panels, approval workflows, customer-facing portals, and data dashboards without building everything from scratch. It runs self-hosted via Docker or on ToolJet Cloud.

How it saves time or tokens

Instead of writing frontend and backend code for every internal tool, ToolJet lets you assemble apps from pre-built components (tables, forms, charts, calendars, maps) and connect them directly to databases, APIs, and SaaS tools. Workflow automation handles multi-step processes with triggers and actions, replacing custom scripts. The visual builder eliminates the need for a separate frontend framework, reducing development time from weeks to hours.

How to use

1. Deploy ToolJet with Docker:

git clone https://github.com/ToolJet/ToolJet.git
cd ToolJet
docker compose up -d

1. Open http://localhost:80 and create an admin account on first visit.

1. Connect a data source (PostgreSQL, MySQL, REST API, Google Sheets, etc.) from the Data Sources panel.

1. Drag components onto the canvas (Table, Form, Chart) and bind them to your data source queries.

1. Add JavaScript transformers or event handlers for custom logic, then deploy your app.

Example

// ToolJet query transformer example
// Filter rows from a PostgreSQL query result
const activeUsers = queries.getUsers.data.filter(
  user => user.status === 'active'
);
return activeUsers.map(user => ({
  name: user.full_name,
  email: user.email,
  lastLogin: new Date(user.last_login).toLocaleDateString()
}));

Related on TokRepo

• No-Code AI Tools — Explore more no-code platforms for building without writing code
• Automation Tools — Tools that automate repetitive workflows and processes

This tool integrates with standard development workflows and requires minimal configuration to get started. It is available as open-source software with documentation and community support through the official repository. The project follows semantic versioning for stable releases.

For teams evaluating this tool, the key advantage is reducing manual work in repetitive tasks. The automation provided by the built-in features means less custom code to maintain and fewer integration points to manage. This translates directly to lower maintenance costs and faster iteration cycles.

Common pitfalls

• Self-hosted ToolJet requires Docker and a PostgreSQL database for metadata storage; do not skip the database setup or you will lose app configurations on restart.
• The visual builder handles most use cases, but complex business logic still requires writing JavaScript in query transformers; plan for developer involvement on non-trivial apps.
• Data source credentials are stored in ToolJet's database; secure your instance with HTTPS and strong admin passwords before connecting production databases.