JSON ↔ YAML Converter
Convert JSON to readable YAML or turn common YAML data structures into formatted JSON, entirely in your browser.
JSON input
YAML output
JSON and YAML conversion
JSON is strict and machine-friendly, while YAML is often preferred for human-edited configuration files. This tool lets you move between the two formats without uploading the data.
Supported YAML
The YAML side supports common configuration structures: nested mappings and sequences, strings, numbers, booleans, null values, inline collections and basic block text. Advanced YAML tags and anchors are not expanded by this lightweight browser tool.
Runs locally
Conversion is performed in your browser. Your JSON or YAML is not sent to KRIYANO.
How to use this tool effectively
Convert common structured data between JSON and YAML when moving configuration, API examples or deployment settings between tools that prefer different formats.
Common uses
- Turn an API JSON example into human-readable YAML for documentation.
- Convert YAML configuration into JSON for systems that only accept JSON.
- Compare how arrays, nested objects, strings and numbers map between formats.
- Cleanly reformat structured data before sharing it with another developer.
Example: JSON object to YAML
{"service":{"name":"api","port":8080}}service: name: api port: 8080
The JSON object becomes an indented YAML mapping while preserving the same logical data structure.
Common mistakes to avoid
- Comments in YAML generally cannot be preserved when converting through a parsed data model.
- Some advanced YAML features have no direct JSON equivalent.
- Check strings that resemble dates, booleans or numbers when exact type preservation is important.
Conversion runs locally in the browser. KRIYANO does not receive the JSON or YAML you paste into the tool.
Frequently asked questions
Will JSON and YAML always convert perfectly both ways?
For common arrays, objects, strings, numbers, booleans and null values, conversion is straightforward. YAML-specific features such as comments, anchors and custom tags may not survive a round trip.
Why are JSON keys quoted but YAML keys often are not?
JSON requires quoted string keys. YAML allows many plain scalar keys without quotes when they are unambiguous.
Which format should I use?
JSON is common for APIs and machine interchange. YAML is often chosen for hand-edited configuration because it can be more readable. The target application ultimately determines the required format.