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Data helper

JSON ⇔ YAML Converter

Convert JSON and YAML in both directions by simply pasting your data.
Switch between JSON to YAML and YAML to JSON instantly and view formatted results in real time.

This tool provides immediate feedback when formatting errors occur, helping you quickly identify syntax issues in configuration files or API payloads.
Converted results can be copied with a single click, making it easy to reuse them
in development, deployment, or documentation workflows.

All conversions are performed directly in your browser.
No input data is sent to any server, ensuring a fast and secure experience
for developers working with configuration files and structured data.

Guide: How to use & features

  • Paste JSON on the left or YAML on the right, then click the corresponding convert button.
  • If parsing fails, the status message turns red and shows the error details.
  • Swap inputs or clear both panels to iterate quickly.

Samples: Sample input & output

Transform JSON to YAML

Input

{"service":"api","port":8080,"enabled":true}

Output

service: api
port: 8080
enabled: true

FAQ: FAQ

  • Are YAML comments kept after conversion?

    No. Comments are not part of the data structure, so a round-trip conversion like JSON ⇔ YAML, which reads the data and writes it back out, drops them. When converting a commented config, plan to re-add any comments you need afterward.

  • How are anchors and aliases (& and *) handled?

    JSON has no anchors or aliases, so on a YAML→JSON conversion the references are expanded (resolved) into their concrete values. Shared structures end up duplicated wherever they were referenced, and the original reference relationship is not restored.

  • Are there type-interpretation gotchas to watch for?

    YAML may read yes/no/on/off as booleans and unquoted digits as numbers. Quote values you want treated as strings — such as a version like "1.10" or a zip code with a leading zero — to avoid bugs from unintended type coercion.

Use cases: Common use cases

  • Converting config formats

    Flip between YAML and JSON to match what tools like Compose or Helm expect.

  • Formatting for documentation

    Share readable YAML in design docs or store machine-friendly JSON for automation.

  • Prepping files for diffing

    Normalize differing formats before comparing so you focus on content changes only.

Notes: Notes & limitations

  • Work stays in your browser

    Inputs and outputs remain local. Closing the tab or clearing cache will remove any temporary state.

  • Validate critical data

    Results are helper outputs—double-check them before sending to production systems or sharing externally.

  • Large payloads depend on your device

    Very large text or files can feel slow in some browsers. Use a desktop environment for heavy workloads.

Formatted results will appear here.

Bidirectional JSON ⇔ YAML Converter

Convert interchangeably and instantaneously between JSON (JavaScript Object Notation) and YAML (YAML Ain’t Markup Language), two standard serialization formats critical for configuration files.
Whether you are writing Kubernetes manifests, Docker Compose scripts, or GitHub Actions workflows, developers constantly run into scenarios like needing to stringify YAML or wanting to validate potentially indented-broken YAML constructs locally in the browser. This secure, stateless utility reliably handles those nuances in real-time.

Common use cases

  • Work with config files: Convert between JSON and YAML for Kubernetes, CI, Docker, and application settings.
  • Validate indentation-sensitive YAML: Catch formatting issues before committing configuration.
  • Prepare API examples: Convert JSON responses into YAML examples for documentation.

Format note

YAML supports features that JSON does not, including comments and some shorthand syntax. After converting YAML to JSON, review whether comments, anchors, or special values were intentionally omitted or normalized.

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