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YAML Converter

Paste YAML and convert it to JSON, XML, CSV, or TOML — switch formats instantly from a single tool.

Last updated: May 28, 2026

Client-Side Processing
Input Data Stays on Device
Instant Local Execution

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What is YAML Converter?

This multi-format YAML converter lets you transform a YAML document into the most common data formats without switching tools. YAML to JSON is the most common conversion — useful when APIs expect JSON. YAML to XML is common for legacy integrations. YAML to CSV works well for YAML arrays of objects. YAML to TOML is useful for Rust or Python configuration files.

How to Use YAML Converter

1

Paste your YAML into the input panel.

2

Select the target format: JSON, XML, CSV, or TOML.

3

Adjust format-specific options.

4

Copy the converted output.

Common Use Cases

  • Converting a YAML config to JSON for an API request body.
  • Transforming a YAML data file to CSV for spreadsheet import.
  • Converting YAML to TOML for a Rust or Python project config.
  • Producing XML from YAML for a legacy system integration.

Example Input and Output

A YAML mapping converts to JSON with a single click.

YAML input
name: Alice
age: 30
active: true
JSON output
{
  "name": "Alice",
  "age": 30,
  "active": true
}

Tip

For YAML to TOML conversion, the root YAML value must be a mapping (object). Arrays and scalars at the root level are not valid TOML.

Frequently Asked Questions

Which formats are supported?
JSON, XML, CSV, and TOML. More formats (such as MessagePack or CBOR) are not supported as they require binary encoding.
Why does CSV only work with arrays?
CSV is a tabular format — it maps naturally to YAML arrays of objects where each object becomes a row. Scalar or nested YAML requires flattening.
Is my YAML sent to a server?
No. All conversion happens entirely in your browser.

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Part of a Collection

Collection
Free YAML Formatter, Validator & YAML to JSON Converter Online
Format, validate, and convert YAML instantly