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Properties YAML Converter

Paste Java .properties text, convert it into nested YAML, review warnings, and export a clean configuration snippet. You can also flatten simple YAML back to .properties.

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Config converterReview warnings

Source config

Paste .properties or simple YAML. Comments, blank lines, escaped separators, and line continuations are handled for common Java config files.

Converted output

Use nested YAML for Spring-style configs, or flat keys when you need a safer one-to-one migration.

app:
  name: "Gogotem"
server:
  port: "3000"
feature:
  upload:
    enabled: "true"
message:
  welcome: "Hello world"
empty:
  value: ""

Conversion check

Keys

5

Groups

5

Lines

5

Warnings

2

Recommendations

  • Unicode escape sequences were decoded. Check non-ASCII labels in the output.
  • Empty values are preserved as empty strings. Confirm whether they should be null or blank. (empty.value)

Migration checklist

  1. 1Keep a backup of the original .properties file.
  2. 2Compare active profiles or environment overrides after migration.
  3. 3Quote values that look like booleans, numbers, or contain colon characters.
  4. 4Run the target application with the converted config before committing it.

Conversion report

Properties YAML Converter
Conversion direction: .properties to YAML
YAML style: Nested YAML
Keys: 5
Groups: 5
Warnings: 2

Recommendations
- Unicode escape sequences were decoded. Check non-ASCII labels in the output.
- Empty values are preserved as empty strings. Confirm whether they should be null or blank. (empty.value)

Converted output
app:
  name: "Gogotem"
server:
  port: "3000"
feature:
  upload:
    enabled: "true"
message:
  welcome: "Hello world"
empty:
  value: ""

How the converter works

The tool parses common Java .properties syntax, unescapes keys and values, builds a nested object from dotted keys, and writes YAML with safe quoting. Reverse conversion flattens simple YAML maps back into dot-separated properties keys.

Usage notes

  • server.port=3000 becomes server: { port: "3000" } in nested YAML.
  • Escaped separators such as app\:name are kept as literal key characters.
  • Duplicate properties keys keep the last value and are reported as warnings.

Frequently asked questions

Does this support every YAML feature?expand_more

No. Reverse conversion focuses on simple maps, which are the safest match for .properties files.

Are values converted to booleans or numbers?expand_more

The output quotes values by default so app behavior does not change unexpectedly.

Are files uploaded?expand_more

No. Conversion happens in the browser text area.

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