JSON ↔ YAML Converter

How YAML and JSON Conversion Works

YAML and JSON are isomorphic for most use cases — both represent maps, lists, strings, numbers, booleans, and null. Toolkiya parses your input with a YAML 1.2 parser running in your browser, builds an in-memory object tree, then serializes it to the other format. JSON to YAML uses block style with two-space indentation by default; YAML to JSON pretty-prints with configurable indentation.

The parser handles anchors and aliases, multi-line scalars (literal '|' and folded '>'), and explicit type tags. Comments are dropped during JSON output since JSON has no comment syntax. Everything runs locally in your tab — there is no API call, so even sensitive configuration files like Kubernetes manifests or CI pipelines stay on your machine.

When to Convert YAML

Translating a Kubernetes manifest into JSON for a tool that does not speak YAML. Converting a docker-compose file to inspect it as a JSON object tree. Moving CI config between systems that prefer different formats. Producing JSON fixtures from a YAML test config. Reading a noisy JSON config more easily by viewing it as YAML.

Why Convert YAML in Toolkiya

Infrastructure-as-code files often contain secrets, internal hostnames, and access policies. Uploading them to an online converter is a real risk. Toolkiya parses and serializes the document entirely in your browser, so the bytes never leave your tab.

There is no signup, no document size cap, no rate limit, and no daily quota. You can convert a small snippet or an entire deployment manifest without any account or quota check.

Tips for YAML Conversion

Watch for YAML's tricky quoting rules: unquoted 'yes', 'no', 'on', 'off' parse as booleans in YAML 1.1 mode. Stick to YAML 1.2 to avoid surprises. Use block style (literal '|') for multi-line strings to preserve newlines exactly. When converting JSON to YAML for human editing, prefer two-space indentation — most CI systems expect it.