Which formats can I convert between?

JSON, YAML, XML, and CSV — in any direction. Each of the twelve conversions has its own page, or use the format selectors here to pick a source and target and switch on the fly.

How does the conversion work?

Your input is parsed into an in-memory data structure and then serialized into the target format — so JSON, YAML, and XML round-trip cleanly. CSV is tabular, so it works best with an array of flat records.

Is my data uploaded anywhere?

No. Everything runs in your browser with JavaScript — your data never leaves your device, which matters for config files and API payloads. It's free with no sign-up; a single unobtrusive ad slot covers hosting.

Omnibus

JSON → YAML

Paste JSON on the left, or try an example.

100% Free
No Sign-Up
No Credit Card
No Free Trial
No Pro Tier
No Watermarks

Nothing is uploaded. Just open it and start.

Convert between JSON, YAML, XML, and CSV

Paste your data, pick a target format, and get clean output instantly — all in your browser. Pick any of the twelve conversions below, or switch formats right in the tool. No sign-up, nothing uploaded.

JSON, YAML & XML

Round-trip cleanly between the three structured formats, with proper indentation.

CSV in and out

Turn arrays of records into a spreadsheet-ready table, or parse a CSV back into data.

A page per pair

Every conversion has its own dedicated page — plus quick format switching and swap.

Private & client-side

Your data never leaves the browser. No server round trip, ever.

All conversions

JSONYAML JSONXML JSONCSV YAMLJSON YAMLXML YAMLCSV XMLJSON XMLYAML XMLCSV CSVJSON CSVYAML CSVXML

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Frequently asked questions

Which formats can I convert between?: JSON, YAML, XML, and CSV — in any direction. Each of the twelve conversions has its own page, or use the format selectors here to pick a source and target and switch on the fly.
How does the conversion work?: Your input is parsed into an in-memory data structure and then serialized into the target format — so JSON, YAML, and XML round-trip cleanly. CSV is tabular, so it works best with an array of flat records.
Is my data uploaded anywhere?: No. Everything runs in your browser with JavaScript — your data never leaves your device, which matters for config files and API payloads. It's free with no sign-up; a single unobtrusive ad slot covers hosting.