JSON to YAML Converter
Related external tools
Some links are affiliate links.
Related tools
Convert JSON to YAML and YAML back to JSON, right in your browser. Paste a config, switch direction, and copy the result — handy for Kubernetes manifests, CI pipelines, docker-compose files and app settings. Nothing is uploaded; the conversion runs entirely on your device.
How to use
- Choose a direction: JSON → YAML or YAML → JSON.
- Paste or type your data into the input box (a sample is loaded to start).
- The converted output appears instantly — copy it with one click.
How it works
JSON and YAML describe the same kind of data — objects (key/value maps), arrays and scalar values — just with different syntax. YAML uses indentation for nesting and a dash for list items, while JSON uses braces and brackets. The converter parses one format into a data structure and writes it out in the other, keeping your keys, lists and values intact.
Features
Two-way conversion
Go from JSON to YAML or YAML to JSON with a single toggle — the output of one direction can feed the other.
Nested structures
Objects within objects, arrays of objects and deep nesting are all preserved through the conversion.
Smart quoting
Ambiguous strings like "true" or "123" are quoted automatically so they stay text and do not turn into booleans or numbers.
Comment aware
When reading YAML, lines and trailing # comments are ignored so they do not break the conversion.
Fully local
Everything happens in your browser — your configs and secrets never leave your device.
When to use it
Kubernetes manifests
Turn a JSON resource definition into the YAML that kubectl expects, or read an existing manifest as JSON.
docker-compose
Convert compose snippets between formats when copying examples from different sources.
App configuration
Switch settings files between JSON and YAML to match what your tool or framework prefers.
API samples
Paste a JSON API response and read it as YAML, which is often easier to scan by eye.
Notes
- YAML output uses readable block style with indentation and dashes for lists.
- Advanced YAML features such as anchors, aliases and explicit tags are not supported.
- Strings that look like booleans or numbers are quoted so their type is preserved.
- All processing runs on your device; nothing you paste is uploaded.
FAQ
- Can it convert YAML back to JSON too?
- Yes. Switch the direction toggle to YAML → JSON and paste your YAML to get formatted JSON back.
- Are comments kept?
- When converting YAML to JSON, # comments are ignored because JSON has no comments. Converting JSON to YAML produces no comments.
- Does it handle large files?
- It works well for typical config files. Very large documents may be slower since everything runs in the browser, but nothing is uploaded.
- Does it support YAML anchors and aliases?
- No. The converter targets common block-style YAML. Advanced features like anchors, aliases and custom tags are not supported.
- Is my data sent to a server?
- No. The conversion is done entirely in your browser and nothing you enter leaves your device.