Convert YAML to JSON, Free
Files convert instantly in your browser. 100% private, any file size, no account needed.
How to convert YAML to JSON
YAML is a human-readable data format popular for configuration files, particularly in DevOps tools like Kubernetes, Docker Compose, Ansible, and GitHub Actions. JSON is the standard format for APIs and web applications. Converting YAML to JSON is a routine task when you need to take a configuration file and pass it to a system or API that expects JSON input.
BoltConverter converts YAML to JSON on its servers. The full YAML structure including nested objects, arrays, strings, booleans, and numbers is preserved in the equivalent JSON representation. The output is pretty-printed and ready to use.
Upload your YAML file or paste YAML
Upload a .yaml or .yml file, or paste YAML text directly into the input area.
Conversion runs on the server
BoltConverter parses the YAML and serializes it to formatted JSON.
Review the JSON output
The converted JSON appears. Check that the structure matches your expectations.
Download or copy the JSON
Download the .json file or copy the JSON text directly from the output field.
Frequently asked questions
Is the YAML to JSON conversion lossless?
For standard YAML data types (strings, numbers, booleans, null, lists, and objects), the conversion is lossless. YAML-specific features like anchors, aliases, and multi-document streams are resolved before output.
Does the converter handle YAML anchors and aliases?
Yes. YAML anchors (defined with &) and aliases (referenced with *) are resolved to their actual values in the JSON output.
Can I convert a Kubernetes manifest or Docker Compose file?
Yes. Any valid YAML file can be converted. Kubernetes manifests, Docker Compose files, and GitHub Actions workflows all convert cleanly.
What if my YAML has multiple documents separated by ---?
YAML multi-document streams are converted to a JSON array where each document becomes one element.
Is my file kept private?
Your YAML is sent over HTTPS and deleted from the server immediately after conversion. BoltConverter does not store your content.