What does Spring Properties / YAML Converter do?

It converts Spring Boot configuration files between application.properties (flat key-value format) and application.yml / application.yaml (hierarchical YAML format).

Does it preserve nested keys?

Yes, it collapses YAML trees into dot-notated property paths and expands dot-notated properties back into proper YAML trees.

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application.yml

application.properties

spring.application.name=order-service
spring.datasource.url=jdbc:postgresql://localhost:5432/orders_db
spring.datasource.username=postgres
spring.datasource.password=secretpassword
spring.datasource.driver-class-name=org.postgresql.Driver
spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true
spring.jpa.properties.hibernate.format_sql=true
server.port=8080

About Spring Props / YAML

Spring Props / YAML is a bidirectional converter that transforms Spring Boot application.properties into hierarchical application.yml configurations and vice versa.

Key Capabilities & Features

✓

Bidirectional conversion between flat dot-notation properties and nested YAML structures

✓

Preserves numerical, boolean, and string values accurately

✓

Handles multi-level nesting and array bracket indexing

✓

100% private in-browser conversion

How to Use Spring Props / YAML

01
Select conversion direction
Choose Properties to YAML or YAML to Properties.
02
Paste configuration text
Enter your Spring Boot properties or YAML configuration.
03
Copy converted config
Copy the transformed configuration directly to your project.

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All operations in Spring Props / YAML run locally in your web browser using HTML5, Web Cryptography, and WebAssembly APIs. Your text, files, credentials, and code never leave your computer.