Convert YAML to JSON and JSON to YAML Online
Kubernetes, Docker Compose and CI files use YAML; APIs use JSON. Convert between them instantly, with validation that catches indentation mistakes.
Open the free YAML ⇄ JSON Converter →What is the YAML ⇄ JSON Converter?
Convert YAML to JSON and JSON to YAML, with validation. It's completely free, needs no sign-up and works on any phone or computer.
Why it's helpful
- Two-way conversion
- Catches YAML indentation errors
- Handy for configs, OpenAPI specs and pipelines
Who it's for
Developers and DevOps engineers.
How to use it
- Paste YAML or JSON and click the direction you need.
- Errors show the line where parsing failed.
💻 Open source: this tool is free and open source (MIT License). View the code on GitHub, download it and run it offline.
The bigger picture: Developer
Developers lose a surprising amount of time to small tasks: formatting data, decoding tokens, converting between formats and checking syntax. Fast in-browser tools keep you in flow and keep sensitive data off third-party servers.
What's changing: AI coding assistants now write a lot of code, but developers still need quick, trustworthy tools to inspect and verify what comes out: formatters, validators and decoders matter more, not less.
Frequently asked questions
Are comments kept?
No. JSON has no comments, so YAML comments are dropped.
