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Developer Data Toolkit

YAML Formatter

Clean up messy YAML and inspect keys, depth and arrays.

Privacy-first — format, validate and inspect data entirely in your browser. Nothing is uploaded to FreeConverter.

Tip: drag & drop a supported file onto this area.

Tool Options

Note: round-trip formatting via js-yaml may normalize or drop comments.

Results

Results will appear here…
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How It Works

Inspector + formatter workflows for developers and QA.

1
⎘

Paste or upload

Paste data or drop XML, YAML, JSON, CSV, SQL or TXT. Nothing is uploaded to our servers.

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2
⚙

Inspect & process

Format, validate or convert in your browser with structure stats and quality warnings.

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3
⇩

Copy or download

Export TXT, JSON, YAML, CSV, SQL, Excel or ZIP instantly.

Your data stays on your device — format, validate and convert locally.

About YAML Formatter

Pretty-print YAML with 2/4 space indent and optional key sorting. Runs fully in your browser via js-yaml. Part of FreeConverter’s Developer Data Toolkit for XML, YAML, CSV, SQL and API payloads.

FAQs

No. The Developer Data Toolkit runs entirely in your browser. FreeConverter servers never receive your input.

Developers, DevOps, API engineers, DBAs and QA — for formatting, validating and inspecting structured data.

Yes. FreeConverter.app browser developer tools are free to use.