Data Format Converter

Convert structured data between JSON, YAML, XML, TOML, NDJSON and CSV — paste it in or point at a file URL, and get a clean converted document back.

What it does

• Converts between JSON, YAML, XML, TOML, NDJSON and CSV in any direction.
• Auto-detects the source format so you don't have to specify it.
• Accepts raw text or a file URL to fetch and convert.
• Runs a batch of many conversions in a single run.
• Returns the converted document as a downloadable file plus a tidy dataset row for each conversion.

Use cases

• No-code pipelines (n8n / Make / Zapier) — run this from the Apify node, then pass the converted output straight to the next step (a webhook, a database, a file store).
• APIs & integrations — turn a YAML config or an XML feed into JSON your app can consume.
• Data prep — flatten JSON or NDJSON into CSV for spreadsheets and BI tools.
• Migrations — move config or fixtures between formats when switching tools.

Input

{
  "data": "{\"name\":\"Ada\",\"roles\":[\"admin\",\"dev\"]}",
  "from": "auto",
  "to": "yaml"
}

Batch mode:

{
  "items": [
    { "data": "a,b\n1,2", "from": "csv", "to": "json" },
    { "data": "name: Ada", "from": "yaml", "to": "xml" }
  ]
}

Output

Each converted document is saved to the run's key-value store and a row is pushed to the dataset.

{
  "from": "json",
  "to": "yaml",
  "bytes": 34,
  "resultUrl": "https://api.apify.com/v2/key-value-stores/.../records/converted-0001.yaml",
  "ok": true
}

Output schema

FAQ

Which formats are supported? JSON, YAML, XML, TOML, NDJSON and CSV — in any direction.

Do I have to set the input format? No. Leave from on auto and it is detected for you.

Can I convert many documents at once? Yes — pass an items array and each is converted and saved separately.

Can I use it in n8n? Yes. Trigger it from the Apify node and pass the output to the next step. See Apify integrations and the Apify API.

Notes

Original clean-room implementation.

You pay only for what the run returns. Set a maximum cost per run and it stops cleanly at that limit.