Most beginner guides stop at SVG and PNG and call it a day, which is fine until you're three months into selling and a print shop asks for an EPS, or you notice a design site is serving WEBP files instead of the JPG you expected. Here's the rest of the picture.

EPS — the print industry's old reliable

EPS (Encapsulated PostScript) is a vector format, similar in concept to SVG, but it's been the standard in professional printing and publishing for decades — long before SVG existed as a web-friendly alternative. Some commercial print shops, embroidery digitizers, and sign makers still specifically request EPS because their older software was built around it. If a print shop asks for EPS and you only have an SVG, most vector editors (including free ones like Inkscape) can open the SVG and re-export it as EPS in a couple of clicks.

AI — Adobe Illustrator's native format

An AI file is essentially Illustrator's own project file — it can contain multiple layers, artboards, and editable text, all preserved exactly as the designer left them. If you're handed an AI file and don't have Illustrator, Inkscape can open basic AI files with mixed results, and Photopea (free, browser-based) tends to handle them more reliably. AI files matter most when you need to actually edit a design's internal structure, not just resize or recolor it as a flat image.

WEBP — the quiet web performance format

WEBP is Google's answer to "why are JPGs and PNGs so big." It compresses images significantly smaller than either format while keeping comparable quality, and it supports transparency like PNG does — which is why a lot of modern websites (including design marketplaces) serve WEBP automatically to speed up page loads. The catch: it's a web display format, not really a production format. If you download a WEBP and need to print it, convert it to PNG first using any free online converter — most printing software and POD platforms don't handle WEBP uploads reliably yet.

When each one actually matters to you

If you're a hobbyist just uploading to Printful or Printify, you can honestly ignore EPS and AI entirely — PNG and SVG cover 95% of that workflow. These formats become relevant the moment you're dealing with a professional print shop, an embroidery digitizer, or editing a complex layered design someone else built. WEBP mostly matters as something to convert away from, not toward, if you're prepping files for print.