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Convert Java Properties and YAML Online

Convert between Java Properties and YAML in your browser. Expand dotted keys such as spring.jpa.x=1 into nested YAML, or flatten YAML back to properties—useful for Spring config migrations.

Quick switch→.env to JSON

ConfigJavaYAML

Quick switch:.env to JSON YAML to JSON

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Use cases

Migrate application.properties to application.yml
Rewrite properties snippets from docs as YAML
Compare the same setting in both formats

How to use

Paste properties or KEY=VALUE config on the left
Convert to nested YAML, or flatten YAML back to properties
Copy the result

Example input and output

Properties

spring.jpa.show-sql=true

YAML

spring:
  jpa:
    show-sql: true

FAQ

Are value types preserved?

Basic inference applies: true/false become booleans, pure numbers become numbers, and everything else stays a string.

Can YAML convert back to properties?

Yes. Nested YAML is flattened to dotted keys; arrays follow common Spring-style forms.

Tools

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.env to JSON

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YAML to JSON

YAML to JSON Converter Online