Paste your YAML config and get clean TOML — parsed and converted entirely in your browser.
Your YAML never leaves this page. Parsing and conversion happen locally in your browser, so it's safe to paste config files containing secrets or credentials.
Waiting for input
Heads up — some values needed adjusting for TOML:
How YAML Maps to TOML
YAML
TOML
Notes
Nested map
[section.subsection]
Nested keys become dotted table headers
List of scalars
key = [1, 2, 3]
Rendered as inline or multi-line array
List of maps
[[section]]
Becomes an array of tables, one block per item
String
"value"
Always quoted and escaped
null / ~
omitted
TOML has no null type — these keys are dropped with a warning
YAML to TOML Converter
The YAML to TOML Converter is a free online developer tool that converts
YAML configuration files into clean, properly formatted TOML. Whether you're
working with Rust projects, application configuration files, DevOps tools,
or cloud infrastructure, this converter makes it easy to transform YAML into
valid TOML in just one click.
All parsing and conversion happen directly in your browser, ensuring your
configuration files never leave your device. No uploads, registrations, or
server-side processing are required.
Features
Convert YAML to valid TOML instantly.
Browser-based conversion for maximum privacy.
Validate YAML before conversion.
Automatically formats TOML output.
Support for nested objects and arrays.
Copy TOML output with one click.
Download converted TOML files.
Supports large configuration files.
No installation required.
Works on desktop, tablet, and mobile devices.
How to Use
Paste your YAML content into the input editor.
The tool validates your YAML syntax automatically.
Click the Convert button.
The converted TOML appears instantly.
Copy the TOML output or download it as a .toml file.
Why Convert YAML to TOML?
YAML and TOML are both popular configuration file formats, but different
applications require different formats. TOML is widely used by Rust projects,
package managers, and modern development tools because of its simplicity and
predictable syntax.
This converter eliminates the need to manually rewrite configuration files,
reducing errors and saving development time.
Supported YAML Features
Nested objects
Lists and arrays
Boolean values
Numbers
Strings
Quoted values
Comments (ignored during conversion)
Multiple configuration sections
Example Conversion
YAML
TOML
title: My App
version: 1.0
debug: true
title = "My App"
version = "1.0"
debug = true
Common Use Cases
Rust application configuration
Cargo.toml generation
DevOps configuration conversion
Cloud deployment configuration
Infrastructure as Code projects
Configuration migration
Application settings conversion
Development workflow automation
Why Use This Tool?
100% free.
Fast browser-based conversion.
Your files never leave your computer.
No login or signup required.
Easy copy and download options.
Designed for developers and DevOps engineers.
Frequently Asked Questions
Is my data uploaded anywhere?
No. Parsing and conversion happen with JavaScript running in your own browser tab. Nothing is sent to a server.
Why don't null values appear in the TOML output?
TOML has no concept of a null or missing value type, so keys set to null or ~ in YAML are dropped. Any dropped keys are listed in the warning box above the buttons.
Does it support multi-document YAML?
This tool converts a single YAML document at a time. If your file has multiple documents separated by ---, convert one section at a time.
What happens to a YAML list of objects?
A list where every item is a map is converted into a TOML array of tables, written as repeated [[section]] blocks — one per list item.