XML to YAML

XML tree converted to readable YAML in the browser.

{{ xmlToYaml.message }}

Overview

The migration from XML to YAML happens primarily in infrastructure and configuration projects. For years, tools like Maven, Ant, Spring, and Hibernate used XML as their default configuration format. With the growth of DevOps and infrastructure-as-code culture, YAML became the dominant language for configuring systems: Docker Compose, Kubernetes, GitHub Actions, Ansible, CircleCI, Helm Charts — almost everything in the modern orchestration ecosystem uses YAML. Being able to migrate legacy XML configurations to YAML is useful in modernization processes.

YAML (YAML Ain't Markup Language — yes, a recursive acronym in the hacker style of the 1990s) was created by Clark Evans and Ingy döt Net in 2001. The philosophy was to create a data serialization format that prioritized human readability above all else. Instead of tags and brackets, YAML uses significant indentation to represent hierarchy — which appeals to readers, but has caused plenty of headaches with subtle spacing errors in production YAML. A well-known vulnerability involving malformed YAML parsing in the Kubernetes ecosystem is a reminder that 'readable' does not mean 'simple'.

Mapping XML to YAML has the same challenges as mapping it to JSON: attributes, mixed content, and namespaces have no direct YAML equivalent. The approach here goes through the same emitter used in JSON-to-YAML conversion — the XML is first converted to a JavaScript object and then serialized to YAML. The result works for most straightforward cases, but XML with sophisticated structure such as multiple namespaces, CDATA, or processing instructions will need manual review.

This tool runs in the browser, with no data sent to the server. Paste the legacy configuration XML, the API response XML, or any document you want to see in YAML format. The result is a starting point — especially useful for anyone migrating a Spring XML project to Spring Boot with YAML configuration, or adapting an XML-based Helm chart to the modern Kubernetes manifest standard.

Technical deep dive

Common questions summarized

  • What is this tool for?: It runs fully in your browser: useful to validate, format, or convert data in everyday development.
  • Are my inputs sent to a server?: Processing happens locally with JavaScript. We do not store what you paste into the text areas.
  • Can I use this for real production data?: Use at your own risk. For secrets (passwords, tokens), prefer controlled environments and your company policies. And always review the generated contents. Never trust blindly things you see on the internet.

Sample payload to try

  • See also the larger "Code Snippets" sample; paste this excerpt to try locally: Sample — <config><debug>true</debug><port>3000</port></config>

Tool guide

  • What XML is See the XML formatter.

  • What YAML is See JSON to YAML.

  • What the converter does Parses XML and writes the same information as readable YAML.

  • Why use it Unify how configs that arrive as XML are viewed when your team prefers YAML, or document hybrid structures.

Code Snippets

Code example
<config><debug>true</debug><port>3000</port></config>

Sample

<config><debug>true</debug><port>3000</port></config>

FAQ

What is this tool for?

It runs fully in your browser: useful to validate, format, or convert data in everyday development.

Are my inputs sent to a server?

Processing happens locally with JavaScript. We do not store what you paste into the text areas.

Can I use this for real production data?

Use at your own risk. For secrets (passwords, tokens), prefer controlled environments and your company policies. And always review the generated contents. Never trust blindly things you see on the internet.