Is this tool free to use?

Yes, this tool is completely free to use. No registration, subscription, or payment is required. All processing happens directly in your browser.

Does this tool upload data to a server?

No. All processing happens locally in your browser using JavaScript. Your data never leaves your device, ensuring complete privacy and security. The tool works even when offline.

Does this tool work on mobile devices?

Yes, this tool is fully responsive and works on all modern browsers including Chrome, Safari, Firefox, and Edge on desktop, tablet, and mobile devices.

Is an internet connection required to use this tool?

No internet connection is required after the page loads. Since all processing happens in your browser, you can use this tool offline once the page is loaded.

Is there a file size limit?

There is no server-side file size limit since files are processed locally in your browser. The only limitation is your device's memory (RAM). For very large files, we recommend processing them in smaller chunks.

📋 YAML Validator

Free online YAML validator and formatter. Validate YAML syntax, convert between YAML and JSON with syntax highlighting and line numbers. Customizable indentation. Perfect for config files, K8s manifests, and CI/CD pipeline debugging.

Enter YAML

server:
  host: localhost
  port: 8080
database:
  name: myapp
  user: admin
  password: secret123
features:
  - logging
  - auth
  - caching

Indent Spaces

Result waiting

💡 Tip: YAML is indentation-sensitive. Use spaces, not tabs. Supports comments (#) and multiline strings.

How to Use the YAML Validator

Using the YAML Validator is straightforward:

Enter Your Values
Input the required numbers and parameters into the calculator fields. Each field is clearly labeled — simply type your values or use the spinner controls to adjust them.
Configure Options
Select any additional options such as computation mode, currency, time period, or precision level. The calculator updates automatically as you change values.
View the Results
The calculated result is displayed instantly with clear formatting. You can Copy the result to your clipboard or adjust input values to see how different scenarios affect the outcome.

FAQ

YAML和JSON有什么区别？

YAML和JSON都是数据序列化格式。YAML更注重可读性，使用缩进表示层级关系，支持注释、锚点等特性。JSON更简洁，语法更严格，解析速度更快。本工具支持YAML和JSON双向转换。

常见的YAML错误有哪些？

常见错误包括：缩进不一致（YAML对空格缩进敏感）、忘记冒号后的空格、使用了Tab而非空格、特殊字符未转义、同层级数据类型不一致等。

YAML用于什么场景？

YAML广泛用于配置文件，如Docker Compose、Kubernetes资源定义、CI/CD管道配置（如GitLab CI、GitHub Actions）、Ansible playbook等。也用于数据交换和API文档。

支持YAML中的注释吗？

支持。YAML注释以#开头，在转换为JSON时会自动去除注释。在格式化和语法验证过程中，注释会被保留。

What's the difference between YAML and JSON?

YAML (YAML Ain't Markup Language) is a human-readable data serialization format defined by the YAML specification. YAML uses indentation for hierarchy, supports comments, anchors (&) and aliases (*), and is more concise than JSON. All valid JSON is also valid YAML. YAML is commonly used for config files (Docker Compose, Kubernetes, Ansible, etc.).