What's actually inside an image's DPI tag (and why changing it is lossless)

<h2> TL;DR </h2> <p>Modern WebAssembly codecs (MozJPEG, libavif, OxiPNG/imagequant, libwebp, gifsicle, SVGO) now run fast enough in the browser that you can ship a real

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<p>A few weeks ago I was filling in yet another government form and hit the line I've hit a dozen times before:</p> <blockquote> <p>"Photograph: 3.5 cm × 4.5 cm, JPEG format, file

<p>Every developer working with cloud infrastructure, CI/CD pipelines, or containerization deals with YAML and JSON daily. </p> <p>Whether configuring a Kubernetes manifest,