YAML → JSON

YAML to JSON Converter Online

Converts YAML to JSON directly in your browser — no data sent to the server. Supports a subset of YAML 1.2 that covers the vast majority of real-world config files.

Supported constructs

• Mappings (key: value) with arbitrary nesting;
• Sequences (items prefixed with -);
• Single- and double-quoted strings;
• Numbers, booleans (true/false/yes/no), null;
• Block scalars (| literal, > folded);
• Inline arrays [a, b] and objects {k: v}.

Limitations

Not supported: anchors and aliases (&anchor, *alias), tags (!!str), multi-document files, inline comments after values.

Frequently Asked Questions

• Can I use configuration files with complex structures and nested objects

  Yes, the tool fully supports complex configuration structures. If your YAML file contains deeply nested objects or arrays for describing settings, the converter will correctly process them and convert them to JSON format. This is especially useful for projects where configuration has many levels of nesting (for example, Kubernetes or Ansible manifests).

• What to do if my YAML uses non-standard data types

  In this case, the tool will try to automatically convert them to the closest standard types in JSON (for example, date strings, special values or custom tags). If the conversion is not possible, you will receive a notification with a description of the problem in the YAML structure. For correct operation, it is recommended to use standard YAML data types.

• Does the tool support batch processing for multiple files

  Yes, it does. The tool allows you to select multiple YAML files at once and convert them in one go. If the files are not related to each other, each will be processed independently and saved separately. For batch processing, you can use the multi-file selection mode, drag and drop, or API for automated integration into your workflow. For large volumes, we recommend checking the result on a test sample first.