JSON → YAML

Convert JSON to clean YAML. Handles nested objects and arrays.

JSON Input0 chars
Output
Lines: -Size: -
Converting via Web Worker…
🛡️️Zero server logs. Conversion runs 100% inside your browser.
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JSON → YAML

Convert JSON data into clean, human-readable YAML format. Handles nested objects, arrays, and proper string escaping. 100% client-side.

🔒 Client-side only⚡ Web Worker processing🌐 Works offline🛡️ Zero server logs

How to Use

  1. Paste your JSON data into the input editor.
  2. Click Convert to generate YAML with proper block-style formatting.
  3. Copy the YAML for use in Docker Compose, CI/CD pipelines, or any YAML config.

Frequently Asked Questions

Questions about this tool? We have got answers.

How are special characters handled?

Strings containing YAML special characters (: { } [ ] etc.) are automatically quoted to ensure valid YAML output.

Does it support multi-line strings?

Yes. Strings with newlines are converted to YAML literal block scalars (|) for readability.

Is my data sent to a server?

No. All processing is 100% client-side in your browser.

Tool Changelog & Updates

v1.1.02026-06-12
  • Fix: Fixed YAML output format — nested objects and arrays now render with proper block-style indentation instead of inline single-line.
  • Feature: Accurate number type mapping — integer values map to the language's native integer type, decimal values map to float/double.
  • UX: Updated module descriptions, How-to guides, and FAQ sections with multi-language support.
  • Fix: Fixed "Conversion complete" toast showing even when JSON parsing failed — now only shows success on actual completion, shows error message on failure.
1.0.02026-06-09
  • Feature: Initial release