YAML ↔ JSON Converter
Convert YAML to JSON or JSON to YAML instantly in your browser.
What is a YAML to JSON Converter?
A YAML to JSON converter transforms data between two of the most widely used human-readable serialization formats. YAML (YAML Ain't Markup Language) is popular for configuration files — Kubernetes manifests, Docker Compose files, GitHub Actions workflows, and CI/CD pipelines all use YAML because of its clean, indent-based syntax. JSON (JavaScript Object Notation) is the standard for APIs, web services, and data interchange due to its universal support across every programming language and platform.
Being able to quickly switch between YAML and JSON saves time when you need to pass configuration data to an API, convert a docker-compose.yml to JSON for programmatic processing, or simply compare how the same data looks in each format. This tool handles both directions: YAML → JSON and JSON → YAML.
All conversion happens entirely in your browser using a pure-JavaScript YAML parser. Your data is never sent to any server.
How to Use
- Choose your conversion direction: YAML → JSON or JSON → YAML.
- Paste your input into the left panel, or click Sample to load an example.
- The converted output appears instantly in the right panel.
- Click Copy to copy the result, or ⬇ to download it as a file.
Frequently Asked Questions
# like this), multi-line strings, anchors and aliases for reuse, and a more readable block syntax. When converting YAML to JSON, any YAML-only features like comments will be dropped, since JSON has no comment syntax.
true, false, yes, no, null, and numbers are parsed as their native types. If you want them treated as strings in the output JSON, wrap them in quotes in your YAML source: value: "true".