IntelliJ and other IDEs provide plugins for the same.

For eg- https://plugins.jetbrains.com/plugin/13804-convert-yaml-and-properties-file

Install the plugin, right click on your yaml or properties file and choose - "Convert yaml and properties file".

Answer from Satakshi Pandey on Stack Overflow
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Mageddo
mageddo.com › tools › yaml-converter
YAML to Properties Converter Online - Convert Properties to YAML - MAGEDDO
Convert YAML to Properties and Properties to YAML online easily. Free YAML to Properties converter tool for developers.
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Javainuse
javainuse.com › app2yaml
Online Properties to YAML Converter
In various applications like Spring Boot, application configuration can be specified using either properties file or yaml file.
People also ask

Is the YAML converter free to use?
Yes! Our YAML converter is completely free with no limitations. Convert as many files as you want between all 10 supported formats. No registration or sign-up required.
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yamltools.dev
yamltools.dev › en › format-converter
Convert YAML to JSON, Properties, TOML - YAMLTools.DEV
Can I convert large YAML files?
Yes. The converter runs entirely in your browser, so file size is only limited by your browser's memory. Most configuration files convert instantly. For very large files (10MB+), conversion may take a few seconds.
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yamltools.dev
yamltools.dev › en › format-converter
Convert YAML to JSON, Properties, TOML - YAMLTools.DEV
Does the converter preserve data types?
Yes, our converter preserves data types like strings, numbers, booleans, arrays, and nested objects across all supported formats. Some format-specific limitations apply (e.g., CSV flattens nested structures).
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yamltools.dev
yamltools.dev › en › format-converter
Convert YAML to JSON, Properties, TOML - YAMLTools.DEV
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Upendra-thunuguntla
upendra-thunuguntla.github.io › mule-yaml-tools
YAML to Properties Converter | Mulesoft
Transform your YAML to Properties or fetch keys to use them in the mule processors · Input File : Choose a yaml file... (or) Paste your YAML here : Get Keys only · Enclose in ${**key**} Enclose in Mule::p("**key**") Load Example Clear Remove YAML Values Convert ·
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Yamltools
yamltools.dev › en › format-converter
Convert YAML to JSON, Properties, TOML - YAMLTools.DEV
Free YAML converter online. Convert YAML to JSON, XML, TOML, INI, Properties, CSV, and more. Also convert INI to YAML, TOML to YAML, and Properties to YAML.
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Easycodeforall
easycodeforall.com › yaml-to-property-converter.html
YAML to property file converter online.
Both YAML and Property are being used almost every application and converting Yaml to Property is very common requirment. This YAML to Property Converter tool converts YAML to Property string. It can be directly used online free. No need to download it. It has implemented to conversion algorithim in JAVA.
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JetBrains
plugins.jetbrains.com › plugin › 13804-convert-yaml-and-properties-file
Convert YAML and Properties File - IntelliJ IDEs Plugin | Marketplace
Convert YAML and Properties File Github | Gitee You can quickly convert Properties files to YAML files, or YAML files to Properties files.
Find elsewhere
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Baeldung
baeldung.com › home › spring › spring boot › how to convert application.properties to application.yml for spring boot
How to Convert application.properties to application.yml for Spring Boot | Baeldung
July 25, 2025 - If we’re using IntelliJ as our IDE to run the Spring Boot application, we can do the conversion by installing the following plugin: We need to go to File > Settings > Plugins > Install “Convert YAML and Properties file“.
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JetBrains
plugins.jetbrains.com › plugin › 12446-convert-yaml-to-properties
convert yaml to properties - IntelliJ IDEs Plugin | Marketplace
- At first select yaml file. - Convert action is also available from the context menu after right-clicking yaml file. You can find it also in the menu: Code -&gt...
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Codetoolset
codetoolset.com › devtools › properties2yaml › index.html
Online properties to yaml, yml tools (properties to yaml, yml)-codetoolset.com
HTML/JS Convert · FontAwesome Icon/Code · KeyCode Table · Big Text Font Generator · Image Compressor · Rounded corner image · ICO online generation · WEB safe color · Online palette · Image size/format conversion · Online picture to Base64 · SVG code editing · Pop up window generator · JSON to C# class · Mysql to Java entity class · SQL to CSharp entity class · Oracle to Java entity class · SQL Field/Value view · properties to yaml ·
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Enterpurpose
enterpurpose.com › home › free tools › yaml to properties
Online YAML to Properties Converter (Free) - Java Config
Online YAML to properties converter. Free tool for Java and Spring Boot migration. Free yaml to properties converter.
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NamLabs
tools.namlabs.com › properties-yaml
Properties to YAML Converter - NamLabs Tools
If you have a non-standard or custom properties file format with specific syntax or conventions, the tool might not be able to convert it accurately. It's recommended to test the converter tool with your specific properties file format to ensure compatibility. Does a Properties to YAML Converter tool support bidirectional conversion (YAML to properties)?
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GitHub
github.com › eldada › yaml-to-properties
GitHub - eldada/yaml-to-properties: A bash script using yq (https://github.com/mikefarah/yq) to convert a yaml file (or a part of it) to a properties file · GitHub
As of yq version 4.12, there is a built-in Yaml to Properties support. It (almost) covers all capabilities of yaml-to-properties.sh. Convert a YAML formatted file to a flat properties file with a bash script and the yq utility NOTES:
Starred by 6 users
Forked by 3 users
Languages   Shell
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GitHub
github.com › up2code › yaml2props
GitHub - up2code/yaml2props: Convert YAML to Properties for Spring configuration
Simple script for convert YAML to Properties file for Spring application configuration.
Starred by 26 users
Forked by 34 users
Languages   Python 97.7% | Shell 2.3% | Python 97.7% | Shell 2.3%
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GitHub
github.com › Codearte › props2yaml
GitHub - Codearte/props2yaml
There is also IntelliJ IDEA plugin called "Properties to YAML Converter" which provides easy way of using this library · Online converter: https://props2yaml-codearte2foss.rhcloud.com/conversion
Starred by 40 users
Forked by 16 users
Languages   Java 63.2% | Groovy 36.8% | Java 63.2% | Groovy 36.8%
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YAMLine
yamline.com › domicile › yaml to properties
Convert YAML to Properties
September 28, 2024 - YAML text: para: "hello world" Properties How to convert YAML to Properties Fill in the YAML editor, and it will be automatically converted to Properties in the associated editor. It is worth noting that this tool also supports the reverse conversion. To do this, simply fill in or modify the ...
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Wefreestar
wefreestar.com › toolbox › properties-to-yaml-converter
Properties and YAML Converter - WeFreeStar online tool
Convert to YAML Convert to Properties Clear Properties Clear YAML · Check format Upload file Copy result Format ·