Best Free Online Developer Tools to Use in 2026
A practical, opinionated list of the best free online developer tools worth using in 2026, organized by category so you can find what you need fast.
Aug 08, 2026
Prettier Config Generator
Generate Prettier configuration files visually. Choose your options and get a ready-to-use .prettierrc file.
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What is Prettier Config Generator?
Prettier is an opinionated code formatter that supports JavaScript, TypeScript, CSS, HTML, JSON, YAML, Markdown, and many more languages. Instead of memorizing configuration options or editing the file manually, use this generator to create your .prettierrc file visually.
This tool generates valid Prettier configuration in multiple formats (JSON, YAML, JavaScript, TOML). Every option updates in real time so you can see exactly what your config will look like before saving it to your project. The generated config uses standard Prettier option names and follows the official Prettier documentation.
How to Use
- Select Output Format — Choose your preferred config format: JSON, YAML, JavaScript, or TOML.
- Adjust Options — Customize print width, tab width, semicolons, quotes, trailing commas, and other Prettier options using the form controls.
- Preview in Real Time — The generated configuration updates instantly as you change any option.
- Test Examples — Click "Standard Config" or "Compact Config" to load predefined presets and see how different settings affect the output.
- Copy or Download — Use the copy button to copy to clipboard, or click download to save the file. Place it in your project root as
.prettierrc,.prettierrc.yaml,.prettierrc.js, or.prettierrc.toml.
Frequently Asked Questions
What is the difference between .prettierrc formats?
Prettier supports multiple config file formats. JSON (.prettierrc) and YAML (.prettierrc.yaml) are the most common and easiest to read. JavaScript (.prettierrc.js) allows dynamic configuration. TOML (.prettierrc.toml) is less common but supported. Prettier checks for these files in order of priority.
Do I need to install Prettier first?
Yes. This tool only generates the configuration file. You still need to install Prettier in your project (npm install --save-dev prettier) and optionally add integration with your editor or CI pipeline.
Can I use this config with other formatters?
No. Prettier uses its own configuration format. However, Prettier can be integrated with ESLint via eslint-config-prettier to avoid conflicts. If you need a general formatter for non-JavaScript projects, consider EditorConfig instead.
Is my data stored?
No. Everything runs entirely in your browser. Your data is never sent to any server.
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