JSON ↔ YAML ↔ TOML Converter

Paste any config file — JSON, YAML, or TOML — and convert between all three formats. Auto-detects the source format. Handles nested objects, arrays, booleans, numbers, and dates. Handy for flipping between YAML for Kubernetes/GitHub Actions and JSON for APIs, or porting configs between tooling ecosystems. 100% client-side: nothing is uploaded.

Auto-detect input format

From:To:

Sample:

YAML input

JSON output

{
  "app": {
    "name": "myapp",
    "version": "1.0.0",
    "debug": true
  },
  "database": {
    "host": "localhost",
    "port": 5432,
    "replicas": [
      "db1",
      "db2",
      "db3"
    ]
  },
  "features": {
    "auth": true,
    "analytics": false
  }
}

Notes

• Everything runs in your browser. No upload.
• Auto-detect works for most inputs; toggle manually if needed.
• TOML output requires a top-level object (not an array).
• JSON can't represent YAML/TOML comments — comments are stripped.
• Use \u2194 swap to flip direction fast.
• Handles nested objects, arrays, booleans, numbers, dates.

Related Tools

Markdown Editor

Free online Markdown editor with live preview. Write and preview Markdown in real-time with GitHub Flavored Markdown support.

WYSIWYG Markdown Editor

Rich text WYSIWYG editor that outputs clean Markdown. Free online visual Markdown editor.

Markdown to HTML

Convert Markdown to clean HTML code instantly. Free online Markdown to HTML converter with copy and download options.

HTML to Markdown

Convert HTML to clean Markdown instantly. Free online HTML to Markdown converter. Paste HTML and get Markdown output.

About JSON ↔ YAML ↔ TOML Converter

Convert config files between JSON, YAML, and TOML instantly. Auto-detects input format. Zero upload, runs in your browser. Free, no signup. This tool runs entirely in your browser — no data is sent to any server. Your content stays private and secure. MarkdownMe provides free, fast, and reliable Markdown tools for developers, writers, and anyone who works with Markdown.