YAML Toolkit

Format, minify, validate YAML and convert YAML ↔ JSON in your browser with LocalKit. Self-hosted js-yaml—configs stay local with no third-party processing API.

Interactive controls load with JavaScript. Processing stays in your browser—nothing is uploaded.

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How to use

  1. Open YAML Toolkit — Open the tool and wait for controls.
  2. Paste YAML or JSON — Paste into the input. Data stays local.
  3. Choose a mode — Format, minify, validate, or convert.
  4. Copy output — Copy the result into your config or editor.

Limits

Requires JavaScript. Extremely large inputs may slow the browser tab. Results depend on your browser APIs; there is no server-side processing quota because nothing is uploaded.

When to use

When you want a quick, free utility without creating an account or sending content to an online converter.

When not to use

When you need server-side integration, batch automation at scale, or certified compliance tooling.

Privacy note

Tool inputs are processed in your browser only. Theme, language and favorites may use localStorage; hosting may keep standard access logs (IP, UA, URL) without tool payloads.

FAQ（5）

Is YAML uploaded?

No. Parsing and conversion use self-hosted js-yaml in your browser.

YAML vs JSON mode?

Format/minify/validate work on YAML; switch modes to convert YAML ↔ JSON.

Why did parsing fail?

Check indentation (spaces, not tabs in most cases) and quote special characters.

Does it support anchors/aliases?

js-yaml supports common YAML 1.2 constructs; exotic tags may not round-trip.

Offline after first load?

Yes—the vendor script is same-origin; after cache, you can keep working offline.