YAML to Properties (.env) Converter
Convert YAML to a Properties file online, for free, in your browser. This YAML to Properties converter flattens nested configuration from a .yaml or .yml file into dot-notated key=value pairs — the format used by Java .properties files and many .env-style configuration loaders.
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
- Nested keys are joined with dots, e.g. database.host=localhost.
- List items use bracketed indices, e.g. servers[0]=alpha.
- Values are written as plain text, so quote-sensitive values are left unescaped.
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
site.version=1.4.2
site.active=true
tags[0]=web
tags[1]=cli
tags[2]=tools
author.name=Jane Doe
author.email=jane@example.com
YAML to Properties (.env) Converter FAQ
Can I use this output as a .env file?
Yes, though .env files conventionally use uppercase keys, so you may want to rename keys after exporting.
Can I convert YAML to Properties in Java?
Yes. In Java, load the YAML with SnakeYAML, flatten the resulting Map, and write each entry with java.util.Properties.store(). This tool gives you the same result instantly in the browser, without setting up a Java project.
How are nested mappings flattened?
Nested keys are joined together with dots, preserving the full path to each value.
Are comments preserved?
YAML comments aren't part of the parsed data, so they aren't carried over to the output.
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 Properties" conversion and a "yaml to Properties" conversion produce identical results.