YAML to JSON Converter
Convert YAML config and data files — Docker Compose, Kubernetes, GitHub Actions, OpenAPI — into clean JSON. Errors show the exact line.
Runs in your browser — your code is never uploaded. Tip: drop a file on the input box, or press Ctrl + Enter.
How to Convert YAML to JSON
Three steps from a .yaml file to JSON.
Paste or Upload YAML
Paste YAML, or upload a .yaml / .yml file.
Choose Options
Pick the indent, and tick Multiple documents for files with --- separators.
Copy or Download
Copy the JSON or download data.json.
Reads
.yaml & .yml
Multi-doc
--- supported
Errors
Line & column
Privacy
Runs in your browser
Works on
Phone & computer
Price
100% free
YAML vs JSON
The same data written both ways.
| YAML | JSON |
|---|---|
name: Asha | {"name": "Asha"} |
tags: - admin | {"tags": ["admin"]} |
active: true | {"active": true} |
# comment | removed (JSON has no comments) |
port: "8080" vs port: 8080 | "8080" (text) vs 8080 (number) |
Anchors &base / *base | Expanded into full values |
What Can You Use It For?
Popular ways people use YAML to JSON Converter.
Docker Compose
Read or check docker-compose.yml as JSON.
Kubernetes
Convert manifests for kubectl, APIs or scripts.
CI/CD Pipelines
Inspect GitHub Actions and GitLab CI files.
OpenAPI / Swagger
Turn an OpenAPI YAML spec into JSON.
Tips for the Best Result
- YAML uses spaces, not tabs, for indentation — tabs are the most common error.
-
Put quotes around values like
"08:30"or"yes"if they must stay text. - Validate or minify the result with the JSON Validator.
- Need a schema for your config? Use JSON to JSON Schema.
Frequently Asked Questions
Quick answers about YAML to JSON Converter.
Paste your YAML or upload a .yaml/.yml file. The JSON appears instantly — copy it or download data.json.
Yes. .yml and .yaml are two file extensions for the same format.
They are removed, because JSON does not support comments.
Yes. Tick Multiple documents (---) and you get a JSON array with one item per document.
Usually because of tabs, wrong indentation or a missing space after a colon. The message shows the line and column.
Yes. &anchor and *alias are expanded into full values in the JSON.
No. Everything runs in your web browser, so your code and data never leave your device.
Yes — 100% free, with no sign-up and no limits.
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