Is it safe to paste config files with secrets?

Yes. The conversion runs entirely in your browser. No data is sent to any server, and the parser uses a safe schema that prevents code execution.

Are YAML anchors and aliases supported?

Yes. Anchors and aliases are resolved during parsing, producing the expanded JSON structure.

Can I convert JSON back to YAML?

Yes. JConvert supports bidirectional conversion. See the JSON to YAML tool.

What happens to YAML comments?

Comments are discarded during conversion since JSON does not have a comment syntax.

Does my data leave my browser?

No. All processing is 100% client-side. Your configuration files stay on your machine.

Convert YAML to JSON Online

YAML is everywhere in modern infrastructure — Kubernetes manifests, CI/CD pipelines, Ansible playbooks, and application configs. But many APIs, tools, and programming languages work natively with JSON. This converter bridges that gap instantly.

JConvert uses a secure YAML parser that prevents code execution, so you can safely paste configuration files containing anchors, aliases, and multi-line strings without risk.

Everything runs in your browser. Your config files never leave your machine.

Open YAML to JSON Converter

What this converter does

The converter parses YAML documents using the js-yaml library with the JSON_SCHEMA setting. This means only JSON-safe types are produced: strings, numbers, booleans, null, arrays, and objects. YAML-specific types like timestamps, binary data, or custom tags are not interpreted, ensuring predictable and safe output.

The resulting JSON is pretty-printed with 2-space indentation.

Common use cases

Converting Kubernetes YAML manifests to JSON for programmatic manipulation
Parsing Docker Compose files into JSON for tooling and scripting
Transforming GitHub Actions or GitLab CI config files into JSON for validation
Feeding YAML-based configuration into JSON-only APIs or SDKs
Debugging YAML indentation issues by examining the parsed JSON structure

How to use JConvert

Paste or upload your YAML configuration on the converter page.
Click Convert — the YAML is parsed and formatted as JSON instantly.
Download or copy the JSON output for your application or API.

Notes and limitations

Only single YAML documents are supported (multi-document --- separators parse only the first document).
YAML anchors (&) and aliases (*) are resolved during parsing.
YAML comments are discarded since JSON does not support comments.
Custom YAML tags (e.g. !!python/object) are not interpreted for security reasons.
Maximum input size is 10 MB.

Privacy and security

The parser runs entirely in your browser with the JSON_SCHEMA setting enabled, which blocks execution of any YAML-specific types. Your configuration data, secrets, and environment variables are never transmitted to any server.

Example

YAML input

server:
  host: localhost
  port: 3000
database:
  url: postgres://localhost/mydb
  pool_size: 5

JSON output

{
  "server": {
    "host": "localhost",
    "port": 3000
  },
  "database": {
    "url": "postgres://localhost/mydb",
    "pool_size": 5
  }
}

Ready to convert your data?

Open YAML to JSON Converter

Frequently Asked Questions

Is it safe to paste config files with secrets?: Yes. The conversion runs entirely in your browser. No data is sent to any server, and the parser uses a safe schema that prevents code execution.
Are YAML anchors and aliases supported?: Yes. Anchors and aliases are resolved during parsing, producing the expanded JSON structure.
Can I convert JSON back to YAML?: Yes. JConvert supports bidirectional conversion. See the JSON to YAML tool.
What happens to YAML comments?: Comments are discarded during conversion since JSON does not have a comment syntax.
Does my data leave my browser?: No. All processing is 100% client-side. Your configuration files stay on your machine.

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