YAML to JSON Converter

Convert common YAML mappings, lists and scalars to JSON.

Data inspection workspaceData stays in your browser. Nothing is uploaded to the server.

YAML input

Supported YAML: mappings, sequences, quoted/plain scalar values. Advanced tags, anchors, aliases, merge keys and block scalars are rejected with an error.

Privacy-focused processingBrowser processing is used wherever practical.

25-minute cleanup policyServer files, when required, are removed after completion—not during active work.

JSON, CSV, XML or YAML as applicableMaximum size and exact support are shown inside the tool.

About This Tool

Convert a safe, explicitly supported YAML subset into formatted JSON without executing tags.

How to Use

Paste YAML mappings or lists.
Click Convert to JSON.
Review or download the JSON result.

Tool Features

Nested mappings and sequences
Quoted strings and simple scalars
Clear unsupported-syntax errors
Local JSON download

Common Use Cases

Everyday work

Complete repetitive formatting or calculation tasks.

Publishing

Prepare clean output for websites and documents.

Local review

Inspect and verify your result before downloading.

Supported Input and Output

JSON, CSV, XML or YAML as applicable

Check the tool workspace for its exact file-size limit.
Browser format support can vary by device and browser version.
Always review the generated result before important use.

Frequently Asked Questions

Does it support every YAML feature?

No. Advanced tags, aliases, anchors, merge keys and multiline block scalars are rejected. Use a dedicated YAML library if those features are needed.

Security and Privacy Information

Local first

Supported processing runs inside your browser whenever practical.

Temporary files

When server processing is required, cleanup starts only after the work completes.

Your responsibility

Avoid uploading confidential data unless you understand the displayed processing notice.