About YAML to TOML Converter
The TooliFyra YAML to TOML Converter is a free online tool that transforms YAML data into TOML (Tom's Obvious Minimal Language) format. TOML is a minimal configuration file format that is easy to read and maps directly to hash tables. It is the standard configuration format for Rust (Cargo.toml), Python (pyproject.toml), and Go (go.mod).
Converting between YAML and TOML is a common task when migrating projects between languages or tools that use different configuration formats. This converter handles nested objects (as TOML tables), arrays (as TOML inline arrays), strings, numbers, booleans, and null values.
How to Use
- Paste YAML data: Enter or paste your YAML content into the input textarea on the left side.
- Click Convert: Press the "Convert to TOML" button to parse the YAML and generate TOML output.
- Review the output: The TOML appears in the output panel with proper table headers and formatting.
- Copy or use: Click "Copy TOML" to copy the result for use in your Cargo.toml, pyproject.toml, or go.mod files.
Key Features
Table SectionsNested YAML objects are converted to TOML [table] and [table.subtable] sections.
Inline ArraysYAML lists are converted to TOML inline arrays with proper bracket notation.
Type PreservationStrings, numbers, booleans, and null values are correctly typed in the TOML output.
Quoted StringsStrings containing special characters are properly quoted for TOML compatibility.
Error DetectionClear error messages for invalid YAML input with line references.
Browser-BasedAll conversion happens locally for maximum speed and complete privacy.
Benefits
The YAML to TOML Converter eliminates the tedious process of manually restructuring data from YAML's indentation-based syntax to TOML's section-based syntax. The converter automatically generates the correct [table] headers and handles nested structures, saving you significant time and preventing errors.
TOML is increasingly popular in modern development tools (Cargo, Poetry, Go modules), and this converter makes it easy to work with TOML even when your data source is in YAML format. All processing happens locally, keeping your configuration data private.
Use Cases
Rust DevelopersConvert YAML configuration to Cargo.toml format for package management and project configuration.
Python DevelopersTransform YAML configs to pyproject.toml for Poetry, Pipenv, and modern Python tooling.
Go DevelopersConvert YAML data to TOML for go.mod and Go application configuration files.
DevOps EngineersMigrate configuration formats between tools and platforms that use different standards.
Why TooliFyra?
TooliFyra provides a complete suite of free developer tools. The YAML to TOML Converter features accurate parsing, proper TOML table generation, type preservation, and a clean interface. No registration, no ads, no tracking — just fast, reliable format conversion.
FAQ
What is TOML?
TOML (Tom's Obvious Minimal Language) is a minimal configuration file format that is easy to read and maps directly to hash tables. It uses [table] headers for sections and key = value pairs for data. It is the standard for Cargo.toml (Rust), pyproject.toml (Python), and Go modules.
How are nested objects handled?
Nested YAML objects are converted to TOML [table] and [table.subtable] sections. For example, database.host becomes [database] header followed by host = "value".
Does it handle arrays?
Yes. YAML lists are converted to TOML inline arrays using bracket notation: key = ["item1", "item2"]. Multi-line arrays use TOML's standard multi-line syntax.
Is my data kept private?
Absolutely. All parsing and conversion happens entirely in your browser. Your YAML data never leaves your device, ensuring complete privacy.
