YAML / JSON Converter

YAML与JSON互转。
YAML INPUT
结果

Bidirectional

YAML to JSON and JSON to YAML.

Validation

Syntax validation with error messages.

Copy Result

One-click copy to clipboard.

Client-side

All processing in your browser. No data uploaded.

关于YAML / JSON Converter

The YAML to JSON Converter (and JSON to YAML Converter) lets you switch instantly between two of the most widely used data serialization formats. YAML is prized for human readability and is the standard format for configuration files in tools like Docker Compose, Kubernetes, GitHub Actions, and Ansible. JSON is the universal language of APIs and web services. Converting between them is a daily task for developers, DevOps engineers, and data engineers. Paste YAML and get properly formatted JSON with correct indentation in one click. Or paste a JSON API response and transform it into clean YAML for use in a configuration file. The converter uses the js-yaml library, which provides full YAML 1.2 support including multi-line strings, anchors, aliases, comments handling, and complex nested structures. Both directions include syntax validation: if your input contains errors, you get a clear error message explaining what went wrong and where, saving you from hunting through large files for a missing colon or misaligned indentation. You can copy the result to clipboard or download it as a file. All processing happens in your browser with no data uploaded, making it safe for sensitive configuration data like API keys, database credentials, and infrastructure definitions.

如何使用YAML / JSON Converter

  1. Choose your conversion direction using the toggle at the top: "YAML to JSON" or "JSON to YAML".
  2. Paste your YAML or JSON into the left input panel.
  3. The converted result appears in the right panel automatically as you type.
  4. If there is a syntax error in your input, an error message will appear below the panels with details.
  5. Click "Copy" to copy the output to your clipboard, or click "Download" to save it as a .json or .yaml file.
  6. Switch directions at any time using the toggle — the panels will clear so you can start fresh.

常见问题

Does this support all YAML features?

The converter uses the js-yaml library which supports YAML 1.2, including nested mappings, sequences, multi-line strings (block scalars), boolean and number types, and null values. YAML anchors and aliases are resolved during parsing. Comments in YAML are ignored when converting to JSON since JSON has no comment syntax.

Why does my YAML boolean "yes" become true in JSON?

YAML 1.1 treated values like "yes", "no", "on", "off" as booleans. The js-yaml library used here follows the YAML 1.2 spec, where only "true" and "false" are booleans. If you paste older YAML that uses "yes"/"no", they will be converted to boolean true/false in the JSON output.

Can I convert Kubernetes or Docker Compose YAML files?

Yes. Kubernetes manifests and Docker Compose files are standard YAML. Paste the content directly and the tool will parse them correctly. Note that multi-document YAML files (separated by ---) will only parse the first document.

Why does JSON to YAML add extra quotes around some strings?

YAML requires quoting strings that could be ambiguous — for example, strings that look like numbers, booleans, or contain special characters like colons. The quotes ensure the value is always interpreted as a string.

Is there a file size limit?

There is no enforced size limit; the tool runs in your browser and is limited only by available memory. For very large files (hundreds of kilobytes), performance may slow down.

Is my data sent to a server?

No. All parsing and formatting is done client-side using JavaScript. Nothing is transmitted over the network.

YAML / JSON Converter 完全使用指南与免费在线工具

无需安装、完全免费、纯前端本地运行的高效 YAML / JSON Converter 工具

用于快速解决：YAML与JSON互转。。无需安装复杂软件，打开网页即可立即使用，极速且安全。

为什么选择 Metoolzy 的 YAML / JSON Converter？

  • 秒级即时响应: 极致性能优化，输入即可见结果。
  • 数据绝对安全: 纯浏览器本地计算，数据绝不上传服务器。
  • 完全免费使用: 无需注册登录，无任何隐形消费。

三步快速上手

  1. 打开 Metoolzy YAML / JSON Converter 工具页面。
  2. 在输入区粘贴或上传您的数据。
  3. 即时查看处理结果并点击复制或下载。

功能对比表

对比项 Metoolzy YAML / JSON Converter 普通在线工具 本地客户端软件
使用成本 永久免费 有次数限制或收费 需购买授权
隐私保护 纯本地内存运行 数据需上传云端 本地运行

适用人群与应用场景

  • 软件开发人员日常调试与数据转换
  • UI/UX 设计师资产处理
  • 运营与办公人员效率提升

常见问题解答 (FAQ)

处理的数据会被记录或保存吗？

绝不会。所有运算均在您的浏览器本地完成，没有任何数据回传。