jpegoptim Optimize JPEG

Optimize JPEG

Strip the bloat from JPEG files — progressive encoding and smart quality for the smallest sharp result.

  • Free forever
  • No watermark
  • No signup
  • Batch ready

Optimize

Drag & drop files here, or

Accepts .jpg, .jpeg

  1. Upload your JPEG files.
  2. Each is re-encoded with optimised, progressive settings.
  3. Download the optimised files.

All jpegoptim tools

Optimize JPEG Optimize Strip the bloat from JPEG files — progressive encoding and smart quality for the smallest sharp result. Aggressive Compress Compress Push file size down hard when bytes matter more than pixel-perfect quality. JPEG to WebP To WebP Convert JPEG to WebP for smaller, faster-loading web images. Resize Image Resize Scale source images to web dimensions before optimising.

jpegoptim.com is a focused JPEG optimiser for people who care about page speed. The main tool re-encodes JPEGs with optimised, progressive settings for the smallest sharp result; supporting tools cover aggressive compression, WebP conversion, and resizing. Free, no watermark, batch-friendly.

The docs below explain JPEG internals, optimisation, and how to ship lean images in a real pipeline.

From source to shipped

A typical flow: resize the source to its display size, optimise the JPEG, and consider WebP for the smallest modern delivery. Each step is one upload away.

From our guides

Browse all articles →
JPEG internals JPEG Chroma Subsampling: 4:4:4 vs 4:2:0 Explained JPEG chroma subsampling explained: how 4:4:4, 4:2:2, and 4:2:0 save space and when they cause visible blur on red text and thin lines. 4 min read Build pipeline tips jpegoptim vs MozJPEG vs jpegtran: Which to Use? Choose the right JPEG tool: jpegtran for lossless transforms, MozJPEG for encoding from originals, jpegoptim for optimising existing files. 4 min read Build pipeline tips How to Automate Image Optimization in Your Pipeline A guide to automating image optimisation across build time, upload time, and delivery time so every image ships compressed and right-sized without anyone remembering to do it. 6 min read JPEG optimisation how-to How to Optimize JPEG Files for Faster Web Pages A practical, step-by-step guide to optimising JPEG files for the web by choosing the right quality, stripping metadata, optimising Huffman tables, and enabling progressive encoding. 6 min read Web performance & images Images and Core Web Vitals: Fixing LCP, CLS and INP A guide connecting image optimisation to Core Web Vitals, showing how to fix LCP with lighter heroes, prevent CLS with image dimensions, and help INP by right-sizing files. 6 min read JPEG internals JPEG Compression Explained: How the Format Works A clear walkthrough of how JPEG compression works, from colour conversion and chroma subsampling through the DCT, quantisation, and entropy coding, and why some images compress better. 6 min read WebP & modern formats JPEG vs WebP: Which Format Should You Use in 2026? A detailed comparison of JPEG and WebP covering file size, quality, transparency, and browser support, with guidance on when to use each and how to convert with a fallback. 5 min read JPEG internals Lossless JPEG Optimization: Smaller Files, Zero Loss A guide to lossless JPEG optimisation explaining how Huffman table optimisation, metadata stripping, and progressive re-ordering reduce file size without altering any pixel data. 6 min read

Frequently asked questions

Is jpegoptim.com free?
Yes — free, no watermark, no signup.
Does it change how my photo looks?
Optimisation keeps quality high and visually unchanged; aggressive compression trades a little sharpness for size.
Can I batch process?
Yes, upload many files at once.