Kusto Formatter

A lightweight formatter for Kusto queries that improves readability for developers, data engineers, and DBAs by applying consistent indentation and styling.

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1,776+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how Kusto Formatter processes input data instantly inside your browser.

Sample Input Minified string: {"id":1,"status":"active","roles":["admin"]}

Computed Result

{
  "id": 1,
  "status": "active",
  "roles": [
    "admin"
  ]
}

Execution Mode Client-Side In-Browser JS

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About This Tool

Kusto Formatter is a developer-focused tool that reformats Kusto Query Language (KQL) text to a consistent, readable style. It accepts raw queries and applies standardized indentation, line wrapping, and keyword casing. The formatter operates as a pipeline: tokenize the input, parse into a structured representation, apply style rules, and emit a clean, well-formatted output. It supports common KQL constructs like let statements, unions, joins, summarize, project, where, and extend, while preserving comments, string literals, and special characters. It is designed for speed, accuracy, and non-destructive changes that enhance maintainability without changing query logic.

The formatter aims to integrate smoothly into developer workflows, CI pipelines, and collaborative editing environments, ensuring consistent style across teams.

Save your calculation history with a free account

How to Use

Provide inputs: paste your KQL query into the query field.
Choose options: set indentation size, line length, and keyword casing.
Run formatting: execute the formatter to produce a standardized query.
Review outputs: inspect the formatted result and adjust rules if needed.
Copy/export: copy the formatted text or export to a file.

Frequently Asked Questions

Find Quick Answers

What formats does it accept?

Accepts plain KQL text, including let statements, unions, and aggregations; preserves comments and string literals during reformatting.

Will it execute my query?

No. It is a formatting tool only; it does not run queries against Azure Data Explorer or any database.

Can I enforce team-wide styles?

Yes. Configure indent, line length, and keyword casing to standardize KQL formatting across repositories and CI pipelines.

How does it handle errors?

If input contains syntax errors, the formatter applies best-effort reflow and reports unresolvable sections while preserving valid regions.

Need to run multiple calculations?

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