Convert TOML to INI
Convert TOML configuration files to INI format instantly. Perfect for Python project config migration and legacy system compatibility.
By ChangeThisFile Team · Last updated: March 2026
ChangeThisFile converts TOML configuration files to INI format instantly in your browser. Upload modern TOML config files and get legacy INI format for older systems. Perfect for Python project migrations and system compatibility.
Convert TOML to INI
Drop your TOML file here to convert it instantly
Drag & drop your .toml file here, or click to browse
Convert to INI instantly
TOML vs INI: Format Comparison
Key differences between the two formats
| Feature | TOML | INI |
|---|---|---|
| Syntax style | Modern, expressive | Simple key=value |
| Nested sections | Full nesting support | Flat sections only |
| Data types | String, integer, float, boolean, array | Strings (all values) |
| Comments | # comments | ; or # comments |
| Arrays | Native array support | Comma-separated strings |
| Standards | TOML specification | Informal standard |
| Tool support | Modern Python tools | Legacy Windows apps |
When to Convert
Common scenarios where this conversion is useful
Python project migration
Convert modern pyproject.toml files to legacy setup.cfg INI format for compatibility with older Python tooling.
Legacy system integration
Adapt modern TOML configuration files for legacy applications that only read INI format configuration files.
Windows application config
Convert TOML config files to Windows INI format for desktop applications and system configuration.
Configuration standardization
Migrate diverse TOML configurations to standardized INI format for consistent deployment across different environments.
How to Convert TOML to INI
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1
Upload TOML file
Drag and drop your .toml configuration file onto the converter, or click to browse and select your file.
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2
Convert to INI
The converter translates TOML syntax to INI format, flattening nested sections and converting data types appropriately.
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3
Download INI
Click Download to save your converted .ini file with compatible formatting for legacy systems and applications.
Frequently Asked Questions
Yes, completely free with no file size limits or conversion restrictions. All processing happens locally in your browser.
No. All conversion happens locally in your browser using client-side JavaScript. Your configuration files never leave your device.
Nested TOML sections are flattened into INI format using dot notation (e.g., [database.connection] becomes [database.connection]).
All TOML data types are converted to strings in INI format, with arrays becoming comma-separated values and booleans as 'true'/'false'.
Yes, the converter handles pyproject.toml files and other Python project configuration files, converting them to compatible INI format.
Yes, TOML comments (using #) are preserved in the INI output, maintaining documentation and configuration notes.
Yes, the generated INI files follow standard Windows INI format conventions and are compatible with applications expecting INI configuration.
TOML arrays are converted to comma-separated values in INI format, making them readable by applications that parse INI arrays.
Yes, the converter efficiently handles large configuration files with many sections and complex nested structures.
Yes, the converter validates TOML syntax and provides error messages if the input file contains invalid TOML formatting.
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