Modern image, video, audio, font and PDF formats — what to use when, how to convert, and how to keep file size small without quality loss.
Choose web video codecs by audience, device support, quality target, encoding cost, and delivery model—not by compression charts alone.
WebP lossless often beats PNG on file size, but not always. Here is when it helps, when it does not, and how to test it properly.
Variable fonts are powerful, but production results depend on subsetting, caching, rendering, CSS discipline, and design restraint.
Compress web audio well by choosing the right codec, bitrate, source workflow, and listening test—not by crushing everything to MP3.
ICO, PNG and SVG all still matter for favicons. Here is the practical set most modern sites should ship.
Readable type isn't about aesthetics—it's about reducing friction. Here's what actually matters for body text in 2026.
AVIF delivers better compression than WebP for photos and illustrations, but encoding is slower and support gaps remain. Here's the practical decision tree.
