YAML ⇄ JSON Converter

Convert between YAML and JSON locally in your browser.

🌐 Uses API

Also try:Historical Age Calculator·Pet Age Calculator·Relationship Timeline

Tips for YAML

Indentation matters. Prefer spaces (2) over tabs.
Lists use dashes (- item). Maps are key: value pairs.
Strings can be quoted; unquoted scalars may be coerced during conversion.
Anchors/aliases and complex tags may not fully round-trip to JSON.
On error, invalid YAML will show an error toast—fix indentation/colons first.
Tip: Use Reset to clear one side, or Reset all to clear both panels; use Pretty JSON to format JSON output.
Tip: Press Ctrl/Cmd + Enter in a panel to convert that side instantly.

YAML

Pretty JSON

JSON

Frequently asked questions

Is my data uploaded?

No. Everything runs locally in your browser.

What YAML/JSON is supported?

Standard YAML 1.2 and JSON. Complex types and nested structures are supported.

Can I copy or download?

Yes. Use Copy to clipboard or Download to save as .json or .yml.

Related tools

Privacy

Most processing happens locally in your browser for speed & privacy. Network calls occur only for live rates or updates.

Premium

Premium feature

Historical analysis & trends

Track your past calculations and visualize patterns.

Calculation presets

Save, load, and manage your favorite calculation setups.

Import

No presets saved yet.

Scenario planning

Compare multiple inputs side-by-side.

Batch processing

Upload a CSV to compute results in bulk.

Custom formulas

Create and reuse your own rules.

External data

Connect Google Sheets or an API as inputs.

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