Skip to main content
Back to Tools
Web Tools

YAML Merge

Merge multiple YAML documents with configurable strategies — deep merge, shallow merge, or override. Detect and display conflicts between documents. Support for 2+ documents with real-time preview. Runs entirely in your browser — your data never leaves your machine.

yaml merge config deep-merge devops configuration diff

Published June 1, 2026

All interactive tools run entirely in your browser. Your data never leaves your device.

How It Works

Paste two or more YAML documents and select a merge strategy. The tool merges them in order and shows the result along with any detected conflicts. All processing runs entirely client-side.

Features

  • 3 merge strategies: deep merge (recursive), shallow merge (top-level only), override (last wins)
  • Multi-document support: merge 2 or more YAML documents in sequence
  • Conflict detection: identify keys with different values across documents
  • Type mismatch warnings: flag when values have different types (object vs string, etc.)
  • Live preview: results update as you type
  • YAML parser: built-in parser handles common YAML subset (objects, arrays, scalars)
  • Copy result: one-click copy of merged output
  • 4 examples: deep merge, shallow merge, override, conflict scenarios
  • Private: runs entirely in the browser — no data transmitted

Use Cases

  • Configuration management: merge base config with environment-specific overrides
  • Kubernetes: combine base and overlay YAML manifests
  • CI/CD: merge pipeline configuration fragments
  • Docker Compose: combine multiple compose files
  • Ansible: merge variable files with different precedence levels