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JSON ↔ YAML Converter

Convert JSON and YAML both ways. Edit either side live, with validation and syntax highlighting. Free online, no sign-up, no ads.

How It Works

1

Type in either panel

Enter JSON on the left or YAML on the right. The other panel updates live with a 300ms debounce.

2

Fix errors

Invalid input shows an error with the line number. Fix it and the conversion resumes.

3

Format and copy

Use the format button to prettify, minify JSON, or swap panels. Copy from either side.

FAQ

YAML is more human-readable, supports comments, and is the standard for config files (Docker Compose, Kubernetes, GitHub Actions).
YAML comments are lost when converting to JSON (JSON doesn't support comments). Converting back won't restore them. To see exactly what changed between two config versions, try the online diff tool.
The js-yaml library supports basic YAML features including anchors (&) and aliases (*) for DRY configuration.

Built & Maintained by Varstatt

Varstatt is a one-person product studio run by Jurij Tokarski, product engineer since 2011. These tools are free and open — no signup, no catch.