YAML to JSON Converter

Convert between YAML and JSON formats bidirectionally. Free, fast, and runs 100% in your browser.

Kubernetes manifests, Docker Compose files, and GitHub Actions workflows use YAML, but many tools and APIs require JSON. This converter transforms YAML configuration into valid JSON with a single click — preserving all data types, nested structures, and arrays. Errors in YAML indentation are caught and reported with line numbers so you can fix issues quickly.

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YAML ↔ JSON Converter

Convert between YAML and JSON formats. Client-side, no data leaves your browser.

YAML Input

JSON Output

Feature Overview

Feature	Details
YAML → JSON	✓
JSON → YAML	✓
Error reporting	Line numbers
Nested structures	Full support
Privacy	100% client-side

Frequently Asked Questions

Does it preserve YAML anchors and aliases?

Yes. YAML anchors (&) and aliases (*) are resolved during conversion, and the resulting JSON contains the fully expanded data.

Can I convert multi-document YAML?

Convert each document separately for best results. Multi-document YAML with --- separators should be split before conversion.

Does it handle YAML flow style?

Yes. Both block-style and flow-style YAML are supported and correctly converted to JSON.