ToolForgeby ForgeSparse

YAML Tools

Format, validate and convert YAML.

YAML input

Output

name: ToolForge
free: true
categories:
  - SEO
  - Developer
  - AI

Format, validate, and convert YAML online

YAML Tools formats and validates YAML configuration files, and converts cleanly between YAML and JSON — handy for Kubernetes manifests, CI pipelines, and app configs.

Why use this tool

Format & validate

Re-indent YAML to a consistent 2-space style, and instantly surface syntax errors with a clear message.

YAML ↔ JSON conversion

Convert YAML configs to JSON for use in JavaScript, or turn JSON into readable YAML for config files.

Handles nested structures

Correctly parses lists, nested maps, multi-line strings, and other real-world YAML patterns.

Private by design

Your config data never leaves your browser.

How it works

  1. 1Paste your YAML (or JSON, for the JSON → YAML mode) into the input box.
  2. 2Pick Format YAML, YAML → JSON, or JSON → YAML.
  3. 3Copy or download the result.

Frequently asked questions

Good to know

  • YAML is whitespace-sensitive — indentation must be consistent (spaces, not tabs).
  • Switch to JSON → YAML if you have JSON you'd like converted.
  • Runs fully in your browser — nothing is uploaded.