image-formats

18 image file compression tools tested | Creative Bloq
Comparison of all optimisation tools | ImageOptim-CLI

ImageOptim — better Save for Web
ImageOptim alternatives for Windows and Linux
JamieMason/ImageOptim-CLI: Make optimisation of images part of your automated build process

Trimage (lossless) image compressor advpng, jpegoptim, optipng and pngcrush
ImageOptim-inspired, with CLI, much slower and worse compression than @leesei/imgmini

图压 - 简单易用的图片压缩软件

Caesium - Image Compressor
Antelope 5.2.0.0 for Windows - Download

BPG Image format H.265
A new image format for the Web | WebP | Google Developers

toy/image_optim: Optimize images using multiple utilities Ruby
spatie/image-optimizer: Easily optimize images using PHP PHP, saving not prominent
Image Compression with Golang - DEV Community Go, libvips
siiptuo/pio: Optimize images while maintaining the same perceived quality Rust
imager-io/imager: Automated image compression for efficiently distributing images on the web. Rust/Docker

unjs/ipx: High performance, secure and easy to use image proxy based on Sharp and libvips. web server

JPNG.svg (Transparent PNG with JPEG Compression)

JPEG

The Problem with JPEG - Computerphile - YouTube

Comparison of JPEG Lossless Compression Tools - blarg.co.uk

mozilla/mozjpeg: Improved JPEG encoder.

Lepton image compression: saving 22% losslessly from images at 15MB/s | Dropbox Tech Blog

The home of PackJPG

jpegoptim -P -p --all-progressive -s -m 90 --no-action

PNG

A guide to PNG optimization
This Lossless PNG Optimization You're Probably Not Using Shrunk One File an Extra 39% - Zoompf Web Performance

pngquant — lossy PNG compressor fast, ~70%

PNGGauntlet Combines PNGOUT, OptiPNG, and DeflOpt to create the smallest PNGs
PNGOUT Tutorial very slow, ~85%
pngout pngout.png -k0 out.png

OptiPNG Home Page
optipng -preserve -strip all -simulate <file> default compression is fair enough, ~0%
DeflOpt Program: Optimize Compressed Files
TinyPNG – Compress PNG images while preserving transparency use indexed (color palette)
PNGCRUSH very slow, ~10% to larger file ><
pingo
Advance Projects advpng, uses zopflipng, larger file ><

zopflipng

SVG

High Performance SVGs | CSS-Tricks
svg/svgo: Node.js tool for optimizing SVG files
svg/svgo-gui: Node-WebKit based GUI for SVGO

SVGOMG - SVGO's Missing GUI with live feedback
SVGito - An SVG Optimizer — Sketch Master

Case Study: Optimizing SVG Text & Image Delivery with Inline SVG – Sara Soueidan, inclusive design engineer
Web Performance Calendar » Tips For Optimising SVG Delivery For The Web

imagemin

imagemin provides prebuilt native binaries

imagemin not actively maintained, dependencies are old
imagemin/imagemin-cli: Minify images seamlessly
imagemin/imagemin: Minify images seamlessly
1000ch/gulp-image: Optimize PNG, JPEG, GIF, SVG images with gulp task. uses imagemin binaries

npm i -g imagemin-cli imagemin-mozjpeg imagemin-pngcrush imagemin-pngquant
imagemin --plugin=pngcrush --plugin=pngquant --plugin=mozjpeg --plugin=gifsicle --plugin=svgo "images/**" "outdir"

imgmini - npm gulp-image contains all the binaries, provides intuitive reporting interface

[12:08:28] ✔ css-mctn_hdr_home.png -> before=130 kB after=45 kB reduced=84.8 kB (65.3%)
[12:08:29] ✔ css-mfrm_hdr_home.png -> before=181 kB after=62.1 kB reduced=119 kB (65.8%)
[12:08:36] ✔ frbg_eq22_23_home_s1_M.png -> before=720 kB after=232 kB reduced=488 kB (67.8%)
[12:08:42] ✔ frbg_eq22_23_home_s1_T.png -> before=900 kB after=262 kB reduced=638 kB (70.9%)
[12:08:42] ✔ frbg_eq22_23_home_s1_H.png -> before=900 kB after=262 kB reduced=638 kB (70.9%)

Asikur22/npm-imgmini: Image Minify with Gulp Image. CLI wrapper for gulp-image

npm i -g @leesei/imgmini
find <folder> -type f | xargs -P$(nproc) -- imgmini -s

// options for `gulp-image`
{
  pngquant: true,
  optipng: false,
  zopflipng: true,
  jpegRecompress: false,
  mozjpeg: true,
  guetzli: false,
  gifsicle: true,
  svgo: true,
  concurrent: 10,
  quiet: false, // defaults to false
}