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The Blazor Query Builder is a rich and responsive UI for filtering large amounts of data by creating or editing conditions that can be combined with data visualization controls like DataGrid and Charts to view the filtered data. It outputs structured JSON filters that can be easily parsed to create SQL queries. It allows you to create conditions and group them using AND/OR logic.

Data Binding

The Blazor Query Builder can be bound to data from a variety of data sources in the form of a JavaScript object array collection. It auto populates the data source and maps the data to the appropriate fields.

Integration with Data Manager

Integrating the Data Manager control with the Query Builder control simplifies communication with a data source and returns the desired result based on the provided filters.

Summary View

The Blazor Query Builder with rich UI supports a summary view that outputs the filter query in SQL format.

Import and export

Import and export Query Builder data to and from structured JSON and SQL formats.

Touch-friendly and Responsive

The Query Builder for Blazor provides a responsive mode that gives an adaptive, redesigned UI appearance for mobile devices and a great user experience on all phone, tablet, and desktop form factors.

Blazor Query Builder control Touch-friendly and Adaptive Mobile user Interface


The Blazor Query Builder component supports several built-in themes: Tailwind CSS, Bootstrap 5, Bootstrap 4, Bootstrap, Material, Fabric, Fluent, and high contrast. The users can customize any one of these built-in themes or create new themes to achieve their own desired look and feel by either simply overriding SASS variables or using our Theme Studio application.

UI customization with templates

Add controls like Checkbox, Slider, and Dropdown List to the Blazor Query Builder using templates. Use these controls to customize the query builder.

Blazor Querybuilder with Header template.

Header template

Users can define their own widgets for the group header. Customize and/or/not operators and add rules/groups buttons. Use the HeaderTemplate tag directive to define templates.

Blazor Querybuilder with column template.

Column template

Users can define their own widgets for an entire column. Use the ColumnTemplate tag directive to define templates.

Blazor Querybuilder with Value template.

Value template

Users can define their own widgets for column values. Use the ValueTemplate tag directive to define templates.

Complex data binding

Users can select an item from the hierarchical structure options list and create subfields for columns. Users can bind complex data in nested columns or specify a complex data source, providing the separator in the query builder.

Blazor Querybuilder complex data binding.

Web accessibility

  • Fully supports WAI-ARIA accessibility to work with screen readers and assistive devices.
  • Follows WAI-ARIA best practices for implementing keyboard interaction.
  • Follows WCAG 2.0 standards in design of the UI element visuals such as foreground color, background color, line spacing, text, and images.
  • Supports right-to-left (RTL) text direction for users working in right-to-left languages like Hebrew, Arabic, or Persian.

Blazor Query Builder Code Example

Easily get started with the Blazor Query Builder using a few simple lines of C# code as demonstrated below. Also explore our Blazor Query Builder Example that shows you how to render and configure the Query Builder.

@using Syncfusion.Blazor.QueryBuilder

<SfQueryBuilder TValue="EmployeeDetails">
    <QueryBuilderColumn Field="EmployeeID" Label="Employee ID" Type="ColumnType.Number"></QueryBuilderColumn>
    <QueryBuilderColumn Field="FirstName" Label="First Name" Type="ColumnType.String"></QueryBuilderColumn>
    <QueryBuilderColumn Field="TitleOfCourtesy" Label="Title of Courtesy" Type="ColumnType.Boolean" Values="Values"></QueryBuilderColumn>
    <QueryBuilderColumn Field="Title" Label="Title" Type="ColumnType.String"></QueryBuilderColumn>
    <QueryBuilderColumn Field="HireDate" Label="Hire Date" Type="ColumnType.Date"></QueryBuilderColumn>
    <QueryBuilderColumn Field="Country" Label="Country" Type="ColumnType.String"></QueryBuilderColumn>
    <QueryBuilderColumn Field="City" Label="City" Type="ColumnType.String"></QueryBuilderColumn>

@code {
private string[] Values = new string[] { "Mr.", "Mrs." };
public class EmployeeDetails
    public int EmployeeID { get; set; }
    public string FirstName { get; set; }
    public bool TitleOfCourtesy { get; set; }
    public string Title { get; set; }
    public DateTime HireDate { get; set; }
    public string Country { get; set; }
    public string City { get; set; }

Other supported frameworks

Query Builder is also available in JavaScript, Angular, React and Vue frameworks that are built from their own TypeScript libraries. Check out the different Query Builder platforms from the links below,

Blazor Components – 80+ UI and DataViz Components

Frequently Asked Questions

  • Easy to integrate with data visualization components like Grid, Charts, and more.
  • Best UI experience to create filters in the form of JSON and SQL query.
  • Supports importing and exporting Query Builder data to and from structured JSON and SQL formats.
  • One of the best Blazor Query Builder in the market that offers feature-rich UI to interact with the software.
  • Simple configuration and API.
  • Supports all modern browsers.
  • Mobile-touch friendly and responsive.
  • Extensive demos and documentation to learn quickly and get started with Blazor Query Builder.

We do not sell the Blazor Query Builder separately. It is only available for purchase as part of the Syncfusion Blazor suite, which contains over 80 native Blazor components, including the Query Builder. A single developer license for the Syncfusion Essential Studio for Blazor suite costs $995.00 USD, including one year of support and updates. On top of this, we might be able to offer additional discounts based on currently active promotions. Please contact our sales team today to see if you qualify for any additional discounts.

You can find our Blazor Query Builder demo here.

No, our 80+ Blazor components, including Query Builder, are not sold individually, only as a single package. However, we have competitively priced the product so it only costs a little bit more than what some other vendors charge for their Query Builder alone. We have also found that, in our experience, our customers usually start off using one of our products and then expand to several products quickly, so we felt it was best to offer all 80+ Blazor components for a flat fee of $995/developer. On top of this, we might be able to offer additional discounts based on currently active promotions. Please contact our sales team today to see if you qualify for any additional discounts.

No, this is a commercial product and requires a paid license. However, a free community license is also available for companies and individuals whose organizations have less than $1 million USD in annual gross revenue and five or fewer developers.

A good place to start would be our comprehensive getting started documentation.

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