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YAML File Merger

Merge multiple YAML files with various strategies (deep merge, overwrite, combine arrays, etc.)

Click to upload files or drag and drop files here

Maximum file size: 10MB Maximum files: 5
Supported formats: application/x-yaml, text/yaml, text/plain, .yaml, .yml

Key Facts

Category
Data Processing
Input Types
file, select
Output Type
file
Sample Coverage
4
API Ready
Yes

Overview

The YAML File Merger is a powerful utility designed to consolidate multiple YAML configuration files into a single, unified document using customizable merging strategies.

When to Use

  • •When you need to combine fragmented environment-specific configuration files into a master config.
  • •When managing complex infrastructure-as-code setups that require merging multiple service definitions.
  • •When you need to aggregate data from several YAML sources while maintaining specific key-value integrity.

How It Works

  • •Upload your YAML files using the file selector.
  • •Select your preferred merge strategy, such as deep merge for nested objects or shallow merge for top-level keys.
  • •Configure how arrays and conflicts should be handled to ensure the output matches your requirements.
  • •Download the merged YAML file once the processing is complete.

Use Cases

Consolidating microservice configurations into a single deployment manifest.
Merging base application settings with environment-specific overrides (e.g., dev, staging, prod).
Combining multiple documentation or metadata YAML files into a single source of truth.

Examples

1. Merging Environment Configs

DevOps Engineer
Background
Managing separate YAML files for base settings and production-specific overrides.
Problem
Manually copying keys between files is error-prone and slow.
How to Use
Upload the base.yaml and prod.yaml files, then select 'Deep Merge' to combine them.
Example Config
Merge Strategy: Deep Merge; Conflict Resolution: Overwrite
Outcome
A single production-ready YAML file containing all base settings with production overrides applied.

2. Aggregating Service Lists

Backend Developer
Background
Multiple team members maintain separate YAML files defining API endpoints.
Problem
Need to combine these lists into one master registry without duplicating entries.
How to Use
Upload all endpoint files and select 'Concatenate' or 'Merge Unique' for the array strategy.
Example Config
Array Handling: Merge Unique
Outcome
A unified registry file containing all unique API endpoints from all contributors.

Try with Samples

yaml, text, file
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preferred input family yaml,text
yaml, text
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yaml, text
Consul Service Mesh Samples
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Elastic Stack (ELK) Samples
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FAQ

Can I merge more than two files at once?

Yes, you can upload and merge up to 5 YAML files simultaneously.

What is the difference between deep and shallow merge?

Deep merge recursively combines nested objects, while shallow merge only updates top-level keys.

How does the 'Merge Unique' array strategy work?

It combines arrays from multiple files and removes any duplicate entries to ensure a clean list.

What happens if there is a key conflict?

You can choose to overwrite the existing value, keep the first value encountered, or stop the process with an error.

Are my files stored on your server?

No, files are processed in memory and are not stored permanently on our servers.

API Documentation

Request Endpoint

POST /en/api/tools/yaml-merger

Request Parameters

Parameter Name Type Required Description
yamlFiles file (Upload required) Yes -
mergeStrategy select Yes -
arrayStrategy select Yes -
conflictResolution select Yes -
preserveComments select Yes -

File type parameters need to be uploaded first via POST /upload/yaml-merger to get filePath, then pass filePath to the corresponding file field.

Response Format

{
  "filePath": "/public/processing/randomid.ext",
  "fileName": "output.ext",
  "contentType": "application/octet-stream",
  "size": 1024,
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}
File: File

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-yaml-merger": {
      "name": "yaml-merger",
      "description": "Merge multiple YAML files with various strategies (deep merge, overwrite, combine arrays, etc.)",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=yaml-merger",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

Supports URL file links or Base64 encoding for file parameters.

If you encounter any issues, please contact us at [email protected]