> For the complete documentation index, see [llms.txt](https://daseldocs.tomwright.me/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://daseldocs.tomwright.me/getting-started/readme.md).

# Introduction

{% hint style="info" %}
Dasel V3 was released in December 2025. Please raise any issues on [GitHub](https://github.com/TomWright/dasel).
{% endhint %}

<figure><img src="/files/b8kNm9tldDDcIaP6fi3A" alt="Dasel mascot" width="375"><figcaption></figcaption></figure>

Dasel (short for **Data-Select**) is a command-line tool and library for querying, modifying, and transforming data structures such as JSON, YAML, TOML, XML, CSV, and KDL.

It provides a consistent , powerful syntax to traverse and update data - making it useful for developers, DevOps, and data wrangling tasks.

## Features

* **Multi-format support**: JSON, YAML, TOML, XML, CSV, HCL, INI, KDL.
* **Unified query syntax**: Access data in any format with the same selectors.
* **Query & search**: Extract values, lists, or structures with intuitive syntax.
* **Modify in place**: Update, insert, or delete values directly in structured files.
* **Convert between formats**: Seamlessly transform data from JSON → YAML, TOML → JSON, etc.
* **Script-friendly**: Simple CLI integration for shell scripts and pipelines.
* **Library support**: Import and use in Go projects.