Is my .properties data uploaded to a server?

No. Everything runs entirely in your browser with JavaScript. Nothing is sent over the network, which makes the tool safe for sensitive data.

Are dotted keys nested?

Yes. server.host=localhost becomes a server mapping with a host key, following the Spring Boot convention. Conflicting keys (a=1 and a.b=2) raise a clear error.

Which .properties syntax is supported?

Comments (# and !), = and : separators, backslash line continuations and escape sequences like \n, \t and \uXXXX.

100% local — your data never leaves your browser

Properties to YAML Converter — Free Online Tool

Convert Java .properties files to nested YAML instantly in your browser. Free, private and offline-friendly: your data never leaves your device.

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Indentation

Swap: YAML → Properties

Properties input

YAML output

Why convert .properties to YAML?

Migrating a Spring Boot application from application.properties to application.yml by hand is error-prone. Paste your properties above and get the equivalent nested YAML in an instant.

How it works

The converter parses the .properties syntax locally (comments, continuations, escapes), nests dotted keys into mappings and types numbers and booleans conservatively. The output follows the indentation you pick.

Frequently asked questions

Is my .properties data uploaded to a server?: No. Everything runs entirely in your browser with JavaScript. Nothing is sent over the network, which makes the tool safe for sensitive data.
Are dotted keys nested?: Yes. server.host=localhost becomes a server mapping with a host key, following the Spring Boot convention. Conflicting keys (a=1 and a.b=2) raise a clear error.
Which .properties syntax is supported?: Comments (# and !), = and : separators, backslash line continuations and escape sequences like \n, \t and \uXXXX.