jpeg-encoder

Perceptual JPEG encoder

Improved JPEG encoder.

jpegoptim - utility to optimize/compress JPEG files

Research JPEG encoder

JPEG encoder/decoder written in Python

A JPEG encoder in a single C++ file

A super simple Mac GUI for Google's JPEG encoder, guetzli

LibJpeg.Net allows you to read and create JPEG images in .NET compatible languages. It's the managed version of original libjpeg library developed by Tom Lane and the Independent JPEG Group (IJG).

Guetzli perceptual JPEG encoder for Go (Zero Dependencies).

Demo from Chrome Dev Summit of using Web Assembly to optimize images in a browser

Low-memory, zero-dependency image codecs and processing in pure TypeScript for Node.js, browsers, and serverless runtimes. Bounded decode/resize pipelines plus deep TIFF, scientific raster, GeoTIFF, OME-TIFF, and whole-slide support.

A Python program that compresses raw images based on the JPEG compression algorithm.

Python bindings for Google's Guetzli, a JPEG encoder that optimises JPEG compression

Convert (and compress) lots of image formats into JPEG, PNG and WebP formats.

JPEG encoder written in Rust

Guetzli for NodeJS/Browser

MozJPEG wrapper for .Net

Pure Ruby JPEG encoder and decoder with no native dependencies

Guetzling is a simple script for macOS and Linux written in Bash, to automate (recursively finding files) the compression of jpegs using the Guetzli algorithm.

Optimize any image by chroma subsampling and optimized huffman coding in Python. Basically, using JPEG algorithm!