TOML Formatter - Free Online TOML Beautifier
Format and beautify TOML configuration files online. Clean up messy TOML with proper indentation and structure.
What is TOML Formatter?
How to Use TOML Formatter
Paste your TOML content into the input area. Click "Format" to beautify the output with proper indentation, consistent spacing around equals signs, and organized sections. The formatter preserves all your values and structure while making the file clean and readable. Copy the result with one click.
How TOML Formatter Works
Common Use Cases
- Cleaning up Cargo.toml files in Rust projects after adding multiple dependencies
- Formatting pyproject.toml for Python projects to ensure consistent style
- Beautifying Hugo or Netlify configuration files for readability
- Standardizing TOML formatting before committing to version control
- Making configuration files readable for code reviews
- Organizing messy TOML files that have grown over time with inconsistent formatting
Frequently Asked Questions
What is TOML?▼
TOML (Tom's Obvious Minimal Language) is a configuration file format that is easy to read due to its clear semantics. It is commonly used in Rust (Cargo.toml), Python (pyproject.toml), Hugo, Netlify, and many other projects and tools.
Does this formatter validate TOML?▼
This tool formats valid TOML content. If your input has syntax errors, the formatter will attempt to preserve the structure as closely as possible, but the output may not be valid TOML until the errors are fixed.
How is TOML different from JSON or YAML?▼
TOML is designed specifically for configuration files. Unlike JSON, it supports comments and has a more human-friendly syntax. Unlike YAML, it has no significant whitespace issues and is less error-prone for configuration use cases.
Does it support nested tables and arrays of tables?▼
Yes. The formatter correctly handles nested tables ([parent.child]), arrays of tables ([[array]]), inline tables, and all other TOML data structures.
Will it change the order of my keys?▼
No. The formatter preserves the original order of all keys, tables, and sections. It only changes the formatting (spacing, indentation, line breaks), not the structure or order of your content.
Can I format partial TOML snippets?▼
Yes. You can paste a partial TOML file (such as a single section or a few key-value pairs) and the formatter will clean it up. It does not require a complete, valid TOML document.