Install

$ yarn add vite-plugin-compression2 -D

# or

$ npm install vite-plugin-compression2 -D

Usage

Basic Usage

import { defineConfig } from 'vite'
import { compression } from 'vite-plugin-compression2'

export default defineConfig({
  plugins: [
    // ...your plugins
    compression()
  ]
})

Multiple Algorithms

import { compression, defineAlgorithm } from 'vite-plugin-compression2'

export default defineConfig({
  plugins: [
    compression({
      algorithms: [
        'gzip',
        'brotliCompress',
        defineAlgorithm('deflate', { level: 9 })
      ]
    })
  ]
})

Custom Algorithm Function

import { compression, defineAlgorithm } from 'vite-plugin-compression2'

export default defineConfig({
  plugins: [
    compression({
      algorithms: [
        defineAlgorithm(
          async (buffer, options) => {
            // Your custom compression logic
            return compressedBuffer
          },
          { customOption: true }
        )
      ]
    })
  ]
})

With Tarball

import { compression, tarball } from 'vite-plugin-compression2'

export default defineConfig({
  plugins: [
    compression(),
    // If you want to create a tarball archive, use tarball plugin after compression
    tarball({ dest: './dist/archive' })
  ]
})

Options

Compression Plugin Options

params	type	default	description
include	string | RegExp | Array<string | RegExp>	/\.(html|xml|css|json|js|mjs|svg|yaml|yml|toml)$/	Include all assets matching any of these conditions.
exclude	string | RegExp | Array<string | RegExp>	-	Exclude all assets matching any of these conditions.
threshold	number	0	Only assets bigger than this size are processed (in bytes)
algorithms	Algorithms	['gzip', 'brotliCompress']	Array of compression algorithms or defineAlgorithm results
filename	string | function	[path][base].gz or [path][base]. br If algorithm is zstd be [path][base].zst	The target asset filename pattern
deleteOriginalAssets	boolean	false	Whether to delete the original assets or not
skipIfLargerOrEqual	boolean	true	Whether to skip the compression if the result is larger than or equal to the original file

Tarball Plugin Options

params	type	default	description
dest	string	-	Destination directory for tarball

API

defineAlgorithm(algorithm, options?)

Define a compression algorithm with options.

Parameters:

• algorithm: Algorithm name ('gzip' | 'brotliCompress' | 'deflate' | 'deflateRaw' | 'zstd') or custom function
• options: Compression options for the algorithm

Returns: [algorithm, options] tuple

Examples:

// Built-in algorithm with default options
defineAlgorithm('gzip')

// Built-in algorithm with custom options
defineAlgorithm('gzip', { level: 9 })

// Brotli with custom quality
defineAlgorithm('brotliCompress', {
  params: {
    [require('zlib').constants.BROTLI_PARAM_QUALITY]: 11
  }
})

// Custom algorithm function
defineAlgorithm(
  async (buffer, options) => {
    // Your compression implementation
    return compressedBuffer
  },
  { customOption: 'value' }
)

Supported Algorithms

• gzip: Standard gzip compression
• brotliCompress: Brotli compression (better compression ratio)
• deflate: Deflate compression
• deflateRaw: Raw deflate compression
• zstd: Zstandard compression with excellent speed/ratio balance (.zst extension) - Requires Node.js >= 22.15.0 or >= 23.8.0
• Custom Function: Your own compression algorithm

Algorithm Types

The algorithms option accepts:

type Algorithms =
  | Algorithm[] // ['gzip', 'brotliCompress']
  | DefineAlgorithmResult[] // [defineAlgorithm('gzip'), ...]
  | (Algorithm | DefineAlgorithmResult)[] // Mixed array

Migration

If you're upgrading from v1.x, please check the Migration Guide.

Q & A

FAQ

Examples

Basic Gzip Only

compression({
  algorithms: ['gzip']
})

Multiple Algorithms with Custom Options

compression({
  algorithms: [
    defineAlgorithm('gzip', { level: 9 }),
    defineAlgorithm('brotliCompress', {
      params: {
        [require('zlib').constants.BROTLI_PARAM_QUALITY]: 11
      }
    })
  ]
})

Custom Filename Pattern

compression({
  algorithms: ['gzip'],
  filename: '[path][base].[hash].gz'
})

Delete Original Files

compression({
  algorithms: ['gzip'],
  deleteOriginalAssets: true
})

Size Threshold

compression({
  algorithms: ['gzip'],
  threshold: 1000 // Only compress files larger than 1KB
})

Others

• If you want to analyze your bundle assets, try vite-bundle-analyzer
• tarball option dest means to generate a tarball somewhere
• tarball is based on the ustar format. It should be compatible with all popular tar distributions (gnutar, bsdtar etc)

Node.js Version Requirements

• gzip, brotliCompress, deflate, deflateRaw: All Node.js versions supported
• zstd: Requires Node.js >= 22.15.0 or >= 23.8.0

Note: If you try to use zstd compression on an unsupported Node.js version, the plugin will throw a helpful error message indicating the required version.

Sponsors

LICENSE

MIT

Acknowledgements

NWYLZW

Author

Kanno