Free Online Config File Converter
Convert configuration files between YAML, TOML, JSON, and INI formats instantly in your browser. No data is sent to any server -- all conversion happens client-side for maximum privacy and speed.
How It Works
Paste your configuration text into the input panel. The tool automatically detects whether your input is JSON, YAML, TOML, or INI. Select your desired output format from the dropdown, click Convert (or press Ctrl+Enter), and get your converted configuration with syntax highlighting. Copy it to your clipboard or download it as a file with the correct extension.
Supported Conversions
- YAML to JSON -- Convert YAML configuration files to JSON format
- JSON to YAML -- Transform JSON configs into clean, readable YAML
- TOML to JSON -- Convert TOML (used in Rust, Python, Hugo) to JSON
- JSON to TOML -- Generate TOML from JSON configuration data
- INI to JSON -- Parse INI files and output structured JSON
- YAML to TOML -- Convert between YAML and TOML directly
- TOML to YAML -- Transform TOML configurations into YAML
- INI to YAML -- Upgrade legacy INI files to modern YAML format
Understanding Config Formats
JSON
JavaScript Object Notation is the most widely used data interchange format. It supports objects, arrays, strings, numbers, booleans, and null. Used extensively in web APIs, package managers (package.json), and application configuration.
YAML
YAML Ain't Markup Language uses indentation for structure, making it highly human-readable. Popular for Docker Compose, Kubernetes manifests, Ansible playbooks, GitHub Actions, and CI/CD pipeline configuration.
TOML
Tom's Obvious Minimal Language is designed to be easy to read and map to a hash table. Used by Rust (Cargo.toml), Python (pyproject.toml), Hugo static site generator, and increasingly adopted for modern configuration files.
INI
INI files are a simple configuration format with sections and key-value pairs. Common in Windows applications, PHP (php.ini), MySQL (my.cnf), Git (.gitconfig), and many legacy systems.
Why Convert Config Files?
Different tools and platforms require different configuration formats. When migrating between platforms, adopting new tools, or standardizing your team's configuration approach, you often need to convert between formats. This tool makes that process instant and error-free.
Privacy and Security
This converter runs entirely in your browser. Your configuration data never leaves your machine -- no server requests, no data storage, no tracking of your input. Safe for converting configs that contain sensitive values like database credentials or API keys.