YAML Formatter

Pretty-print, minify, and validate YAML

Input

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Output

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YAML Formatter

Format, validate, beautify, and minify YAML instantly with our powerful, browser-based YAML Formatter. Designed with developers and DevOps engineers in mind, this tool delivers lightning-fast performance, clean formatting, and 100% client-side processing to keep your data secure. Whether you're working with configuration files, CI/CD pipelines, or Kubernetes manifests, the formatter handles everything smoothly without slowing down your machine.
Built on the same high-performance core as our industry-leading JSON and XML formatters, the YAML tool ensures precise indentation, real-time error detection, syntax highlighting, and automatic structural validation. It's perfect for debugging configurations, editing large YAML files, analyzing manifests, or simply making unreadable YAML human-friendly.
With support for copy/paste input, file uploads, collapsible nodes, minification, and instant beautification, this YAML Formatter becomes an essential part of any developer's workflow. No installations, no backend requests, no data tracking—just fast, secure, and reliable YAML formatting right from your browser.
Optimize your productivity with a clean UI, blazing performance, and robust YAML parsing capabilities—built to handle even the heaviest datasets with ease.

Key capabilities

  • Smart formatting: Applies proper indentation, keeps structure aligned, and restructures compact YAML for human-friendly review.
  • Lossless minify: Remove whitespace and line breaks for production configs without touching data.
  • Streaming uploads: Drag and drop `.yaml` or `.yml` files up to 30MB+ and process them entirely in-browser.
  • History & downloads: Save formatted snippets locally, rename them, and re-download in one click.

Privacy & reliability

Just like the JSON and XML formatters, the YAML experience is completely local—no uploads, no external APIs, no telemetry. Your YAML never leaves your machine, making it safe for confidential configs, large manifests, or sensitive data.

Robust validation highlights malformed YAML using friendly error cards so you can resolve issues before deploying configurations.

Quick how-to

  1. Paste or upload YAML into the editor on the left.
  2. Click Format for pretty print or Minify to compress.
  3. Copy, download, or save the output to revisit it later.