Prettier Config Generator

Pick your style — quotes, semicolons, line width, indentation, trailing commas — and get a ready-to-commit .prettierrc plus a suggested .prettierignore. Free, instant, and private — generation happens in your browser.

100% Private — Runs entirely in browserInstant calculation & resultFree, no sign-up

Prettier Config Generator

Pick your style choices and get a .prettierrc — plus a starter .prettierignore.

.prettierrc
{
  "semi": false,
  "singleQuote": false,
  "printWidth": 80,
  "useTabs": false,
  "tabWidth": 2,
  "trailingComma": "all"
}

// Suggested .prettierignore (save separately):
// dist/
// build/
// coverage/
// package-lock.json

Why generate Prettier configuration for unified code formatting?

Code formatting arguments waste valuable engineering hours during pull request reviews. Prettier solves this friction by enforcing an opinionated, automated code style across JavaScript, TypeScript, JSX, HTML, CSS, JSON, and Markdown files. By establishing a centralized .prettierrc and .prettierignore configuration in your repository root, every developer on your team automatically outputs identical code regardless of their local code editor or operating system.

ToolJiffy's Prettier Config Generator provides an intuitive interface to customize every formatting option—including quote styles, semicolon retention, tab width, line wrapping thresholds, and trailing commas—and generates both .prettierrc (JSON/YAML/JS format) and .prettierignore files instantly in your browser.

  • Consistent Formatting Rules: Fine-tune print width thresholds, space vs. tab indentation, single vs. double quotes, and trailing comma preferences across all file extensions.
  • Dual File Output (.prettierrc & .prettierignore): Generates matching ignore rules alongside main configuration options to prevent formatting build outputs, lockfiles, and minified bundles.
  • Tailwind CSS & Sort Imports Plugin Support: Easily configure options for popular Prettier plugins like prettier-plugin-tailwindcss for automatic class sorting and import organization.
  • Instant IDE & CI Integration: Emits clean, valid JSON/JS code ready for immediate placement into VS Code, WebStorm, or continuous integration linting steps.

Prettier formatting engine architecture

Prettier operates by parsing source code into an Abstract Syntax Tree (AST), discarding all original formatting, whitespace, and line breaks, and re-printing the entire tree according to strict internal algorithms and your .prettierrc parameters.

Key configuration keys control this re-printing engine. Setting printWidth specifies the target maximum line length before the engine breaks statements across multiple lines. Setting tabWidth defines space indentation levels, while useTabs chooses between spaces and hard tab characters. The semi boolean toggles trailing semicolons at the end of statements, while singleQuote and jsxSingleQuote govern string quote encapsulation in JavaScript and JSX markup respectively.

The trailingComma option (typically set to es5 or all) ensures multi-line structures like objects, arrays, and type definitions end with a comma. This dramatically simplifies git diff reviews because adding new array elements or object properties only modifies the single new line rather than updating preceding lines. The .prettierignore file prevents the AST parser from processing heavy or compiled directories like dist/, build/, coverage/, or node_modules/, keeping your editor format-on-save operations fast.

Client-side security for private formatting rules

Your formatting preferences and repository file ignore lists are generated purely on the client side without network communication. No project settings or workspace paths are ever transmitted to external servers.

Step-by-step guide to generating .prettierrc

  1. Configure formatting options: Adjust print width, tab width, quote styles, trailing commas, semicolons, and end-of-line character settings.
  2. Select export format: Choose between JSON, YAML, or JavaScript export formats for your .prettierrc file.
  3. Copy or download configuration files: Copy the generated .prettierrc and .prettierignore files directly into your project's root folder.

Explore related developer utilities

Enhance your development workflow by building linting rules with our ESLint Config Generator, defining strict compiler flags with the TSConfig Generator, formatting CSS stylesheets with the CSS Formatter, or validating JSON structures using our JSON Formatter.

Frequently Asked Questions

  • What is the main function of a .prettierrc file in a codebase?
    A .prettierrc file defines opinionated code formatting rules for your project, ensuring consistent indentations, line wrapping, quote styles, and semicolon usage across all source files written by different developers.
  • What printWidth and tabWidth values are recommended for modern teams?
    Most modern frontend teams use a printWidth of 80 or 100 characters to prevent excessive horizontal scrolling while maintaining clean side-by-side git diff comparisons, paired with a tabWidth of 2 spaces for readable JavaScript and JSX markup.
  • Why should I set trailingComma to es5 or all?
    Setting trailingComma to es5 or all adds trailing commas to multi-line arrays, objects, and function parameters. This minimizes git diff noise because adding a new item to an object or array only modifies a single line.
  • How does .prettierignore differ from .gitignore?
    While .gitignore prevents untracked files from being committed to version control, .prettierignore specifically prevents Prettier from formatting generated build artifacts, minified scripts, lockfiles, and third-party vendor directories.
  • Can Prettier conflict with ESLint rules and how do I prevent it?
    Yes, conflicts occur if ESLint is configured with visual styling rules. Using eslint-config-prettier turns off all visual formatting rules in ESLint, allowing Prettier to take sole control of code formatting while ESLint focuses on syntax and logic analysis.
  • What is the difference between singleQuote and jsxSingleQuote?
    The singleQuote setting uses single quotes (') for JavaScript and TypeScript strings, while jsxSingleQuote controls whether single quotes are used inside JSX attributes. Many React developers prefer double quotes in JSX and single quotes in JS code.
  • How does Prettier handle line endings across Windows and macOS?
    Setting endOfLine to lf forces Unix-style line feeds across all operating systems. This prevents Windows developers from inadvertently committing carriage return line endings (crlf) into shared git repositories.
  • Is this Prettier configuration generator free and secure?
    Yes. ToolJiffy's Prettier Config Generator runs 100% locally in your web browser. It does not send any workspace options, configuration settings, or source code to remote servers.
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