Free Online TOML Formatter
Format, beautify, validate, and minify TOML code instantly. Supports syntax highlighting and validation.
Drop .toml file here or click to upload
description Input TOML
code Output Result
Key Features
Syntax Highlighting
Color-coded keys, values, table headers, comments, and dates for easy reading and editing.
Comprehensive Validation
Check for duplicate keys, invalid tables, misplaced brackets, malformed values, and syntax errors.
Fast Processing
Instantly format or compact TOML configuration files of any size right in your browser.
Privacy Protected
All processing happens in your browser. No data is sent to servers.
Frequently Asked Questions
Getting Started
What is a TOML formatter?
A TOML formatter normalizes indentation, spacing, and structure in TOML documents so they are consistent and easy to read. It helps prevent parsing errors caused by inconsistent formatting.
Is this TOML formatter free?
Yes. All tools are completely free and run locally in your browser. No signup, no limits, no hidden costs.
Does the tool store my data?
No. Your TOML data never leaves your browser. All processing happens locally on your device, ensuring complete privacy and security.
Features & Usage
How do I format TOML?
Paste your TOML into the input area and click the "Format TOML" button. The tool will normalize all indentation and spacing to consistent conventions.
What is TOML minification?
Minification removes empty lines, trailing whitespace, and unnecessary blank space to produce a more compact document. Click "Minify Code" to compress your TOML.
Can I validate my TOML?
Yes! Click the "Validate" button to check for syntax errors including duplicate keys, invalid table headers, broken arrays, unclosed quotes, and malformed values.
Troubleshooting
Can I use this for Rust Cargo.toml or Python pyproject.toml?
Yes. Any valid TOML document works, including Cargo.toml, pyproject.toml, and other configuration files that use the TOML format.
Can I use this tool offline?
Yes! Once you've visited the page, all functionality works offline thanks to service workers and local processing.