No. Conversion runs entirely in the browser. No network request is made.

Is the output JSON valid?

Yes. Output follows RFC 8259 JSON specification.

Do I need an account?

No. The tool works without signup or email.

YAML ↔ JSON · No upload · Browser

Free YAML to JSON converter

Convert YAML to JSON and JSON to YAML directly in your browser. Flowfiles handles Docker Compose, Kubernetes manifests, Ansible playbooks, GitHub Actions configs and any well-formed YAML. Your data never leaves your device.

JSON indent

Sort keys Multi-document

Auto

YAML source

JSON result

Ready

Main features

4 modes

YAML→JSON, JSON→YAML, format JSON, and validation with detailed error messages.

Indent options

2 spaces, 4 spaces, tab character, or minified JSON — pick what fits your workflow.

Advanced YAML

Multi-document, block or flow style, anchors, special scalars, key sorting.

Local

Everything runs in the browser. Your data never leaves your device.

Frequently asked questions

Is data uploaded?

No. Conversion runs entirely in the browser via JavaScript. No network request is made.

What is Multi-document mode?

Some YAML files contain multiple documents separated by ---. This mode converts them into a JSON array, with each document becoming one element.

What is the difference between Block and Flow style?

Block is the classic YAML style with indentation. Flow uses compact inline notation similar to JSON, useful for short or nested structures.

Which YAML files are supported?

All standard YAML: Docker Compose, Kubernetes manifests, Ansible playbooks, GitHub Actions, GitLab CI, and any well-formed YAML file.

Does Validate mode show the error line?

Yes. For JSON the exact position is reported. For YAML the error context is provided as precisely as possible.

YAML JSON guides

YAML JSON tool Convert YAML to JSON Convert JSON to YAML YAML Kubernetes YAML Docker Compose Validate a YAML file Format and indent YAML Convert YAML without upload Free YAML converter