I absolutely love ImageOptim for manually optimizing SVGs, JPGs, PNGs, and GIFs. It's a simple GUI that wraps some excellent compression libs (including SVGO),

I absolutely love ImageOptim for manually optimizing SVGs, JPGs, PNGs, and GIFs. It's a simple GUI that wraps some excellent compression libs (including SVGO), which I find much faster to use for one-off image optimization than the CLI. It does a clever job of trying multiple compressors and picking whichever one creates the smallest file for each image. You can run it in a lossless or lossy mode, and tune various compression options. It's free (gratis), OSS, and runs on Mac, Windows, and Linux. I make it a habit of running images through ImageOptim before sending them via Messages or Slack, as a courtesy for people on slow connections. https://imageoptim.com https://imageoptim.com (by HN user pornel) Bonus round: When it comes to optimizing SVGs, nothing beats hand-editing the SVG source. I've done a fair bit of that optimizing the artwork for https://www.lunchboxsessions.com https://www.lunchboxsessions.com and it's been totally worth the effort. Taking a detailed 10k SVG down to 500 bytes with no perceptual difference is a huge win when you have hundreds of those SVGs on the page and you serve people who still use dialup.