Skip to main content


ToolJet is an open-source low-code framework to build and deploy custom internal tools. ToolJet can connect to your data sources such as databases ( PostgreSQL, MongoDB, MySQL, Elasticsearch, Firestore, DynamoDB, Redis and more ), API endpoints ( ToolJet supports OAuth2 authorization ) and external services ( Stripe, Slack, Google Sheets, Airtable and more ). Once the data sources are connected, ToolJet can run queries on these data sources to fetch and update data. The data fetched from data sources can be visualised and modified using the UI widgets such as tables, charts, forms, etc.

ToolJet - List view widget

How ToolJet works

ToolJet - List view widget

ToolJet has just 3 fundamental principles for building apps:

  • Connect to data sources: Connect to your existing data sources such as PostgreSQL, MySQL, Firestore, Stripe, Google Sheets, API endpoints, etc.
  • Build queries: ToolJet comes with query builders for all supported data sources. ToolJet also supports the use of custom JavaScript code to transform the query results.
  • Customise widgets: Widgets are the UI components that can be edited using ToolJet's visual app builder ( Eg: tables, charts, forms, etc ). Widgets have events such as on click, on row selected, on page changed, etc. Every UI widget has a dark version.

ToolJet binds together the data sources, queries and widgets to convert business logic into custom applications.

Getting Started

These resources will help you quickly build and deploy apps using ToolJet:

  • Basic Tutorial - Learn how to build simple UI and connect to data sources.
  • Deploy - Learn how to deploy ToolJet on Heroku, Kubernetes, etc

The references for data sources and widgets:

Complete tutorials

Help and Support

  • We have extensively documented the features of ToolJet, but in case you are stuck, please feel free to e-mail us at
  • If you are using ToolJet cloud, click on the chat icon at the bottom-left corner for instant help.
  • If you have found a bug, please create a GitHub issue for the same.
  • Feel free to join our highly active Slack Community.