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Smart YAML Formatter

Auto-fix, validate, diff, convert and share YAML. Kubernetes-aware. Runs entirely in your browser.

Before
kind:Deployment
  name:my-app
	replicas:2
✓ After
kind: Deployment
  name: my-app
  replicas: 2
kubectl copy for:
Input YAML
Output 

        
Click any line to see its path

      

    


    

      
      

        
        
      

      

        
        
        
      

      
    

  


  
  

  
  

  

    
🔒
100% Private
Runs in browser. No data sent to servers.

    
⚙️
Kubernetes-aware
Validates K8s manifests. Checks apiVersion, kind, metadata.

    
⚡
Auto-Fix
Fixes tabs, indentation and common YAML errors.

    
🔗
Share via URL
Share YAML encoded in URL — never stored on server.

    
☸️
Helm Support
Preserves {{ Values.* }} template tags without breaking.

    
↔️
Diff Mode
Compare two YAML files and highlight differences.

  







  
Frequently Asked Questions

  
Everything you need to know about formatting and validating YAML online.

  

    
What is a YAML formatter?+
A YAML formatter takes raw or poorly indented YAML and reformats it with proper structure and indentation, making it easy to read and debug. It also validates the syntax and highlights errors.

    
Is my YAML data safe to paste here?+
Yes, completely. The formatter is 100% client-side. Your Kubernetes configs, secrets, and deployment files never leave your browser.

    
Can I convert JSON to YAML?+
Yes. Paste valid JSON and switch to JSON-to-YAML mode. It converts instantly to clean YAML format in your browser.

    
What is Kubernetes-aware validation?+
The formatter understands common Kubernetes YAML patterns and validates fields like apiVersion, kind, metadata, and spec — helping you catch config errors before applying to your cluster.

    
Can I format large YAML files?+
Yes. Since all processing happens in your browser, there are no server limits or timeouts. You can format large Kubernetes manifests and config files without any restrictions.

  

  

    
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What is a YAML Formatter?

  
A YAML formatter takes raw or poorly indented YAML and reformats it with correct indentation and structure. It also validates your YAML for syntax errors like incorrect indentation, missing colons, or invalid values. Use it to clean up Kubernetes configs, Docker Compose files, CI/CD pipelines, and any YAML-based configuration.


  
How to Format YAML Online

  
Paste your YAML into the editor above and click Format. The tool instantly reformats and validates your YAML, highlighting any errors with line numbers. You can also minify YAML to reduce file size or convert YAML to JSON directly.


  
Common YAML Use Cases

  
YAML is used in Kubernetes manifests, Helm charts, Docker Compose, GitHub Actions, Ansible playbooks, and application config files. This free YAML formatter online works entirely in your browser — no data is sent to any server.