YAML to JSON Converter
Convert YAML to JSON online, for free, in a couple of seconds. Paste or upload a .yaml or .yml file into this YAML to JSON converter and get valid, pretty-printed JSON back instantly — the whole conversion runs locally in your browser, so nothing you paste or upload is ever sent anywhere.
Drop your YAML file here
or
Supports .yaml and .yml files, processed entirely on your device
YAML →JSON
Your converted output will appear here.Conversion notes
What to expect
- Preserves nested objects, arrays, and native types (numbers, booleans, null).
- Pretty-printed with two-space indentation for easy diffing and review.
- Works with typical YAML configuration files and common YAML structures.
Example
site:
name: Aperture Docs
version: 1.4.2
active: true
tags:
- web
- cli
- tools
author:
name: Jane Doe
email: jane@example.com
{
"site": {
"name": "Aperture Docs",
"version": "1.4.2",
"active": true
},
"tags": [
"web",
"cli",
"tools"
],
"author": {
"name": "Jane Doe",
"email": "jane@example.com"
}
}YAML to JSON Converter FAQ
How do I convert YAML to JSON online?
Paste or upload your .yaml or .yml file above, keep JSON selected as the output format, and this online YAML to JSON converter renders valid JSON instantly in the output panel — no installation required.
Does this change my data types?
No. Strings, numbers, booleans, and null values from your YAML are mapped to their equivalent JSON types during conversion.
Can I convert YAML to JSON using Python?
Yes — in Python, load the file with PyYAML (`yaml.safe_load`) and serialize the result with the built-in `json` module (`json.dumps`). This browser-based converter is a faster option when you just need a one-off YAML to JSON conversion without writing or running a script.
Is there a file size limit?
Conversion happens in your browser's memory, so very large files depend on your device rather than a server-imposed limit.
Is there a difference between .yml and .yaml?
No. ".yml" and ".yaml" are just two file extensions for the exact same format — this converter accepts either one, so a "yml to JSON" conversion and a "yaml to JSON" conversion produce identical results.