TOML Editor Online

Edit, validate, and format TOML configuration files directly in your browser. Tidy Code provides syntax highlighting, real-time error detection, and instant conversion between TOML, JSON, YAML, and XML. Perfect for Cargo.toml, pyproject.toml, and other config files.

Open TOML Editor

Features

TOML Syntax Highlighting

Edit TOML with full syntax highlighting for tables, key-value pairs, arrays, inline tables, strings, numbers, booleans, and dates. Indentation guides and line numbers make it easy to navigate complex configurations.

Real-Time Validation

Tidy Code validates your TOML as you type, catching syntax errors, invalid table headers, duplicate keys, and type mismatches. Clear error messages with line numbers help you fix problems instantly.

Format Conversion

Convert TOML to JSON, YAML, or XML with one click. Import files in any of these formats and convert them to TOML. Tidy Code preserves your data structure including tables, arrays of tables, and inline tables.

Configuration File Support

Optimized for editing Cargo.toml, pyproject.toml, Hugo config, Netlify config, and other TOML-based configuration files. Understands TOML-specific constructs like dotted keys and array of tables.

Multi-Tab Editing

Open multiple TOML files in tabs. Compare configurations side by side with the built-in Diff Viewer. Drag and drop to reorder tabs and work across files seamlessly.

Large File Support

Handle large TOML configuration files with WebAssembly-powered parsing. Edit files up to 100MB+ without your browser slowing down.

How to Edit TOML Online

Open Tidy Code in your browser — no installation or signup needed
Paste your TOML or drag and drop a .toml file
Edit with syntax highlighting and real-time validation
Use the Convert button to switch between TOML, JSON, YAML, and XML
Press Ctrl+S to save or copy your formatted TOML

Frequently Asked Questions

How do I edit TOML files online?

Open Tidy Code in your browser, paste your TOML or drag and drop a .toml file. The editor provides syntax highlighting, auto-indentation, and real-time validation for tables, arrays, key-value pairs, and inline tables.

Does the TOML editor validate my configuration?

Yes. Tidy Code validates your TOML as you type, catching syntax errors, invalid table headers, duplicate keys, and type mismatches with clear error messages and line numbers.

Can I convert TOML to JSON or YAML?

Yes. Tidy Code supports converting TOML to JSON, YAML, and XML with a single click. You can also convert JSON, YAML, or XML files to TOML. The conversion preserves your data structure including tables and arrays.

Is the online TOML editor free?

Yes, Tidy Code's TOML editor is completely free with no signup required. Your data stays in your browser and is never sent to any server.