Eslint vs Prettier

Eslint and Prettier are both popular developer tools tools. This page compares their internal architecture, technology stack, data flow patterns, and system behavior — based on automated structural analysis of their source code.

eslint/eslint

27,184
Stars
JavaScript
Language
9
Components
1.7
Connectivity

prettier/prettier

51,753
Stars
JavaScript
Language
10
Components
0.6
Connectivity

Technology Stack

Only in Eslint

espree eslint-visitor-keys @eslint/config-array esutils ajv mocha chai webpack cypress find-up

Only in Prettier

@babel/parser @typescript-eslint/typescript-estree acorn graphql jest flow-parser html-element-attributes mdast-util-from-markdown

Architecture Layers

Eslint (5 layers)

CLI Layer
Command-line interface and argument processing
ESLint Core
Main linting orchestration and file processing
Configuration System
Config loading, validation and merging
Linting Engine
Core rule application and AST traversal
Rules System
Individual rule implementations and utilities

Prettier (4 layers)

CLI Interface
Command-line tools and configuration handling
Core Formatter
Main formatting engine with document builders and printer
Language Plugins
Parser and printer implementations for each supported language
Universal Utilities
Cross-platform utilities and AST manipulation tools

Data Flow

Eslint (8 stages)

  1. Parse CLI Arguments
  2. Load Configuration
  3. Discover Files
  4. Parse Source Code
  5. Apply Rules
  6. Generate Results
  7. Apply Fixes
  8. Output Results

Prettier (4 stages)

  1. Parse Input
  2. Transform AST
  3. Build Document
  4. Print Output

System Behavior

DimensionEslintPrettier
Data Pools42
Feedback Loops32
Delays32
Control Points54

Code Patterns

Shared Patterns

plugin architecture ast visitor pattern

Unique to Eslint

rule system configuration cascading service objects

Unique to Prettier

document builder dsl type guards

When to Choose

Choose Eslint when you need

  • Unique tech: espree, eslint-visitor-keys, @eslint/config-array
  • More detailed pipeline (8 stages)
  • Richer system behavior (more feedback loops and control points)
  • Tighter integration between components
View full analysis →

Choose Prettier when you need

  • Unique tech: @babel/parser, @typescript-eslint/typescript-estree, acorn
  • Streamlined pipeline (4 stages)
  • Simpler system dynamics
  • Loosely coupled, more modular
View full analysis →

Frequently Asked Questions

What are the main differences between Eslint and Prettier?

Eslint has 9 components with a connectivity ratio of 1.7, while Prettier has 10 components with a ratio of 0.6. They share 0 technologies but differ in 18 others.

Should I use Eslint or Prettier?

Choose Eslint if you need: Unique tech: espree, eslint-visitor-keys, @eslint/config-array; More detailed pipeline (8 stages). Choose Prettier if you need: Unique tech: @babel/parser, @typescript-eslint/typescript-estree, acorn; Streamlined pipeline (4 stages).

How does the architecture of Eslint compare to Prettier?

Eslint is organized into 5 architecture layers with a 8-stage data pipeline. Prettier has 4 layers with a 4-stage pipeline. They share design patterns: plugin architecture, ast visitor pattern.

What technology does Eslint use that Prettier doesn't?

Eslint uniquely uses: espree, eslint-visitor-keys, @eslint/config-array, esutils, ajv. Prettier uniquely uses: @babel/parser, @typescript-eslint/typescript-estree, acorn, graphql, jest.

Explore the interactive analysis

See the full architecture maps, code patterns, and dependency graphs.

Eslint Prettier

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Compared on March 25, 2026 by CodeSea. Written by .