TOML Viewer & Editor
TOML Input
Parsed JSON Output
// Enter valid TOML to see JSON output
About This Online TOML Viewer & Editor
This free online TOML viewer and editor lets you parse, validate, and convert TOML configuration files to JSON instantly in your browser. All processing happens client-side — your data never leaves your device, ensuring maximum privacy and security.
What is TOML?
TOML (Tom’s Obvious Minimal Language) is a modern configuration file format designed to be easy to read and write for humans while being unambiguous for machines. Created by Tom Preston-Werner (co-founder of GitHub), TOML is widely used in projects like Rust's Cargo, Python's pyproject.toml, Hugo static sites, and many DevOps tools.
Features
- ✔ Real-time TOML parsing and validation
- ✔ Instant TOML to JSON conversion
- ✔ Syntax error highlighting with detailed messages
- ✔ Copy parsed JSON to clipboard
- ✔ Download JSON output as file
- ✔ Light/dark theme support
- ✔ 100% client-side — secure and private
- ✔ No registration or installation required
Why Use Our TOML Tool?
Whether you're debugging a Cargo.toml, editing a pyproject.toml, or working with any other TOML config, this tool helps you quickly validate syntax and visualize the structure as JSON. Perfect for developers, DevOps engineers, and anyone working with configuration files.
Common Use Cases
- Validate TOML configuration files
- Convert TOML to JSON for API testing
- Debug syntax errors in Cargo.toml or pyproject.toml
- Learn TOML syntax with live feedback
- Quickly format and prettify TOML data
Start using the best free online TOML parser today — no signup needed!