13 Best Free Online YAML Validator Websites

Here is a list of best free online YAML validator websites. YAML or Yet Another Markup Language is a human-readable data serialization language. This language is mainly used in configuration files and applications where data is transferred and stored. This language uses indentation to represent data structure and colons & dashes to denote key-value pairs and lists. To maintain data integrity and error-free YAML code, YAML validation is done. If you also want to validate your YAML code, then check out these online YAML validator websites.

These websites help users determine whether a YAML code adheres to all the rules and doesn’t contain any errors. They also highlight all the detected errors that users can fix within their interfaces. Some of these validators can fetch YAML data from locally stored and cloud-stored services. After evaluating the YAML code, users can save it in TXT or YAML file format. To help novice users, I have included the YAML validation steps in the description of each website.

These websites offer many useful tools like JSON Viewer, XML Viewer, CSS Beautifier, Prettify YAML, Minify YAML, Transform YAML, and more. Go through the list to learn more about these websites.

My Favorite Online YAML Validator Website:

codebeautify.org is my favorite website as it can fetch and validate YAML data from online YAML files. Plus, it can detect and highlight all errors in the YAML code that users can fix manually.

You can also check out lists of best free Online JavaScript Validator, Online CSS Validator, and Online JSON Validator websites.

Comparison Table:

Features/Website Names	Can fetch and validate YAML file data	Supports Syntax Highlighting	Can detect and highlight errors
codebeautify.org	✓	✓	✓
yamllint.com	x	x	✓
jsonformatter.org	✓	✓	✓
onlineyamltools.com	✓	x	✓
yamlchecker.com	x	✓	✓
anyjson.in	✓	x	✓
appdevtools.com	✓	✓	✓
lambdatest.com	x	x	✓
edchart.com	✓	✓	✓
beautifytools.com	✓	✓	✓
wtools.io	✓	✓	✓
site24x7.com	x	x	✓
aspose.app	✓	x	✓

codebeautify.org

codebeautify.org is a free online YAML validator website. Using this website, users can validate YAML data and files. It even lets users fetch YAML files from online sources using their URL links. To improve readability, it adds syntax highlighting to the YAML code. It also detects and highlights all syntax errors. After validating the YAML code, users can download it in YAML file format. Now, follow the below steps.

How to validate YAML code online using codebeautify.org:

Visit this website using the given link.
After that, enter the YAML code in the YAML input section.
Now, click on the Validate YAML button to check whether the YAML code is valid.

Additional Features:

This website has multiple online tools like JSON Viewer, XML Viewer, CSS Beautifier, CSS Validator, API Test, Number Utilities, Program Editors, and more.

Final Thoughts:

It is one of the best free online YAML validator websites through which users can quickly validate both YAML data and YAML files.

Pros	Cons
Can fetch YAML files from online sources
Adds syntax highlighting to the code
Supports both YAML data and files

Home Page

yamllint.com

yamllint.com is a free online YAML validator website. This website allows users to validate the YAML code. It detects and shows the errors in YAML code to users. Along with code validation, users can also perform reformatting and resolve aliases operations. This website not only validates the YAML code but also converts it to a clean UTF-8 version of the YAML code. Now, follow the below steps.

How to validate YAML code online using yamllint.com:

Go to this website and access the YAML Lint section.
After that, write or paste the YAML code.
Now, enable Refomat and Resolve Aliases options if needed.
Next, click on the Go button to view the detected errors or a Valid YAML message.

Final Thoughts:

This website offers a straightforward YAML validator tool that can validate YAML code and convert it to a clean UTF-8 version of YAML.

Pros	Cons
Converts YAML to a clean UTF-8 version of YAML

Home Page

jsonformatter.org

jsonformatter.org is another free online YAML validator website. Through this website, users can validate both YAML code data and YAML code in files. It can also be used to format the YAML code. Besides this, it immediately shows syntax errors in the YAML code. It even adds syntax highlighting to the input YAML data. A good see to queries related to YAML validation is also answered by it. Now, follow the below steps.

How to validate YAML online using jsonformatter.org:

Go to this website and access the YAML Validator.
After that, paste the YAML code or load the YAML code from a file.
Next, click on the Validate YAML button to view if the code is valid or not.

Additional Features:

This website also offers additional tools like JSON Beautifier, JSON Parser, XML Formatter, JS Beautifier, and more.

Final Thoughts:

It is another good online YSML validator website that helps users fix YAML errors and validate the YAML code.

Pros	Cons
Supports both YAML data and files
Adds syntax highlighting to the code

Home Page

onlineyamltools.com

onlineyamltools.com is another free online YAML validator website. This website can validate YAML code in real-time. If it finds syntax errors, it immediately highlights them to the user. On this website, users can also fetch YAML files from local and online sources. It explains this YAML validator with the help of some examples. Now, follow the below steps.

How to validate YAML code online using onlineyamltools.com:

Visit this website and access this YAML validator.
After that, paste the YAML code or upload a YAML code file.
Now, let this tool validate the YAML code.
Finally, view the successful validation message or some syntax errors.

Additional Features:

This website contains multiple handy tools like Prettify YAML, Minify YAML, Transform YAML into CSV, Base64-encode YAML, Generate Random YAML, and more.

Final Thoughts:

It is another good online YAML validator website that anyone can use without much hassle.

Pros	Cons
Can fetch YAML files from online sources	Doesn’t support syntax highlighting
Validate YAML code in real-time

Home Page

yamlchecker.com

yamlchecker.com is another free online YAML validator website. This website offers a standard YAML validator that helps users validate YAML code and find syntax errors in it. It also adds syntax highlighting to the YAML code to improve the readability. Plus, users can edit the YAML code within its interface. However, it cannot fetch the YAML code from files.

This website also explains YAML, shows the advantages of YAML, and lists multiple YAML alternatives like JSON, TOML, JSONS, XML, etc. Now, follow the below steps.

How to validate YAML code online using yamlchecker.com:

Visit this website and access the YAML Syntax Validator.
After that, enter the YAML code in the input section.
Next, view whether the code is valid or not.

Additional Features:

This website also offers tools like JSON Validator, Lorem Ipsum Generator, and URL Encoder & Decoder.

Final Thoughts:

It is another straightforward online YAML validator website that can quickly check and show whether a YAML code is valid or not.

Pros	Cons
Quickly validates YAML code	Cannot fetch YAML data from files
Supports syntax highlighting

Home Page

anyjson.in

anyjson.in is another free online YAML validator website. Through this website, users can quickly verify and validate YAML code. If a YAML code is not valid, then it shows the reasons and errors behind the invalidation of the code. This website can also fetch YAML code from a file. After validating the YAML code, users can download it in TXT file format. This website also explains this YAML validator and the steps to use it. Now, follow the below steps.

How to validate YAML online using anyjson.in:

Visit this website using the given link.
After that, paste the YAML code in the input section.
Next, view whether it is valid or not.

Additional Features:

This website contains multiple handy tools like JSON Validator, XML Validator, Base64 Encoder, HTML Viewer, SQL Beautifier, and more.

Final Thoughts:

It is another good online YAML validator website that anyone can use to quickly validate YAML code.

Pros	Cons
Can fetch YAML code from a file	Doesn’t support syntax highlighting
Shows steps to use this YAML validator

Home Page

appdevtools.com

appdevtools.com is another free online YAML validator website. Through this website, users can easily validate YAML data. Plus, it can also fetch and validate YAML data from files. It also highlights all the errors that invalidate the YAML code. It also lets users edit the YAML code within its interface. To improve readability, it adds syntax highlighting to the code. Now, follow the below steps.

How to validate YAML online using appdevtools.com:

Go to this website and access the YAML Validator.
After that, upload a YAML file or directly paste the YAML code.
Now, click on the Validate button to check if the code is validated or not.

Additional Features:

This website also offers useful tools like HTML Validator, JSON Validator, Credit Card Validator, Hash Generator, URL Encoder, and more.

Final Thoughts:

It is another good online YAML validator website that helps users validate YAML code in no time.

Pros	Cons
Can fetch YAML code from a file
Supports syntax highlighting

Home Page

lambdatest.com

lambdatest.com is another free online YAML validator website. This website offers a basic YAML validator tool that can validate YAML code. However, it cannot fetch YAML data from files. It also doesn’t add syntax highlighting to the code. It does show the errors that are invalidating the YAML code that users can fix for validation.

This website also explains YAML validation and its importance. A good set of queries associated with YAML validation is also answered by it. Now, check out the below steps.

How to validate YAML online using lambdatest.com:

Go to this website and open up the YAML validator.
After that, paste the YAML code in the Input field.
Next, click on the Validate YAML button to determine whether the code is valid.

Additional Features:

This website has a good set of online tools like HTML Escape, Text Uppercase, Extract Text from JSON, XML Escape, CSV Validator, and more.

Final Thoughts:

It is another capable online YAML validator website that anyone can use without much hassle.

Pros	Cons
Explain YAML validation and list its advantages	Cannot fetch YAML code from a file
	Doesn’t support syntax highlighting

Home Page

edchart.com

edchart.com is another free online YAML validator website. This website comes with a simple YAML validator that can fetch and validate YAML code from files. It also shows errors that are invalidating the YAML code. Users can also read and edit the YAML code within its interface. It also lets users adjust the font size based on their requirements. After validating the YAML code, users can download it in TXT format. Now, check out the below steps.

How to validate YAML code online using edchart.com:

Launch this website and go to its YAML validator section.
Now, paste the YAML code or fetch the YAML code from a file.
Next, click on the Validate button to check if the code is valid or not.

Additional Features:

This website offers multiple code beautifiers, code minifiers, JSON tools, SQL tools, HTML tools, and XML tools.

Final Thoughts:

It is a simple and effective online YAML validator website that can fetch and validate YAML code.

Pros	Cons
Can fetch YAML code from files
Supports syntax highlighting
Lets users edit the YAML code

Home Page

beautifytools.com

beautifytools.com is another free online YAML validator website. This website offers multiple online tools including a YAML validator. This tool can validate YAML code and also show errors that are causing YAML code invalidation. It can fetch YAML data from files as well. It also improves the YAML code readability by adding syntax highlighting to it. After validation, users can save the YAML code in TXT file format. Now, follow the below steps.

How to validate YAML code online using beautifytools.com:

Go to this website and look for the YAML Validator.
After that, enter the YAML code in the input section or fetch it from a file.
Next, click the Validate button to check if the input code is valid.

Additional Features:

This website has a good number of online code beautifiers, minifiers, converters, and string utilities.

Final Thoughts:

It is another good online YAML code validator that offers all the essential YAML code validation and error detection tools.

Pros	Cons
Can fetch YAML code from files
Supports syntax highlighting
Let users edit the YAML code

Home Page

wtools.io

wtools.io is yet another free online YAML validator website. This website offers a simple and clean YAML validator in which users can paste the YAML code as well as fetch the YAML code from a file. Plus, it detects and highlights YAML code errors that users can quickly fix and validate the code. To improve readability, it also adds syntax highlighting to the YAML code. After YAML code validation, users can save it in TXT file format. Now, follow the below steps.

How to validate YAML code online using wtools.io:

Visit this website and access the Validate YAML section.
Now, enter the YAML code or fetch it from a file.
Next, click on the Validate button to start the validation process.
Finally, view the validation sign or code errors.

Additional Features:

This website also offers tools like Cryptography Generator, HTML Generator, Color Picker, Code Minifier, Image Manipulator, and more.

Final Thoughts:

It is a simple and effective online YAML validator website that anyone can use to validate YAML codes.

Pros	Cons
Can fetch YAML code from files
Supports syntax highlighting
Lets users save the validated YAML code in TXT format

Home Page

site24x7.com

site24x7.com is another free online YAML validator website. This website offers a standard YAML validator that validates YAML code or finds errors. It also lets users edit the YAML code within its interface. However, it doesn’t support YAML files. Now, follow the below steps.

How to validate YAML code online using site24x7.com:

Go to this website and access the YAML Validator.
Now, write or paste the YAML code.
Next, click on the Valider button to check whether the code is valid.

Additional Features:

This website contains multiple Domain, Synadmin, Converter, Developer, Cloud, validation, and Formatter Tools.

Final Thoughts:

It is another good online YAML validator website that can quickly determine whether a YAML code is valid.

Pros	Cons
	Cannot fetch YAML code from files
	Doesn’t support syntax highlighting

Home Page

aspose.app

aspose.app is the last free online YAML validator website. This website can fetch YAML files from local storage and cloud storage (Google Drive, Dropbox, and OneDrive) services. Users can also paste the YAML code on its interface and validate it. It also finds and highlights the errors in the YAML code. After validating the YAML code, users can download it in YAML format. Now, follow the below steps.

How to validate YAML code online using aspose.app:

Visit this website using the given link.
After that, upload a YAML file or paste the YAML code.
Next, click on the Validate button to perform the YAML code validation.
Finally, download the validated YAML code in YAML file format.

Additional Features:

This website also offers additional tools like Code Minifier, HTML Generators, Sitemap validator, Distance Converter, Pixel Calculator, and more.

Final Thoughts:

It is another good online YAML validator website that anyone can use without much hassle.

Pros	Cons
Can fetch YAML files from cloud storage services	Doesn’t support syntax highlighting

Home Page

Frequently Asked Questions

What is YAML used for?

YAML is widely used for creating configuration files for software and applications. Developers use YAML to specify settings, options, and parameters for their programs. Common examples include configuration files for web servers, databases, continuous integration tools, and more. YAML can be used to serialize and deserialize data structures in a language-independent way. This is valuable for data exchange between different programming languages or for storing data in a human-readable format.

Why use YAML instead of JSON?

YAML is designed to be more human-readable than JSON. It uses indentation and clean, minimal syntax, making it easier for humans to write and understand, especially for complex data structures. This makes it well-suited for configuration files and other situations where human readability is essential.

What is the full form of YAML?

Yet Another Markup Language is the full form of YAML. It is a human-readable data serialization language. This language is mainly used in configuration files and applications where data is transferred and stored. This language uses indentation to represent data structure and colons & dashes to denote key-value pairs and lists.

What is the advantage of YAML?

YAML is designed to be human-readable and easy to write. Its indentation-based structure and minimal punctuation make it more approachable for non-technical users, as well as developers. YAML has a straightforward and minimal syntax. It uses indentation to represent data hierarchies, and this simplicity makes it accessible to a wide range of users. YAML is often more concise than other data formats, such as XML or JSON. It uses less punctuation, resulting in cleaner and more compact data representations.

Which is faster JSON or YAML?

JSON and YAML are not directly comparable in terms of speed because they serve different purposes and have different use cases. The "speed" of JSON or YAML is generally not a primary consideration when choosing between them. Instead, you should consider their readability, compatibility, and ease of use. However, if you are concerned about parsing and serialization performance, JSON is often faster to parse and generate compared to YAML. This speed difference is primarily due to the syntax and design of the two formats:

Web Applications