Is This a Vector?

Someone emails you a logo. You're about to put it on a banner, a sign, or the side of a truck — and you have no idea whether it will come out crisp or a blurry mess. Designers can tell at a glance from the file type. Everyone else is guessing.

Is This a Vector? answers the question for them. Drop in a file and it tells you, in plain English, whether it's a true vector that scales to any size or a raster image that will fall apart when you blow it up.

Every file gets a letter grade from A (a clean vector) to F (a raster image), with a plain-English explanation of what that means for printing. It handles the formats real people actually send — SVG, PDF, AI, EPS, PNG, JPG, GIF, WebP, and PSD.

It also checks the file's real type from its first bytes, not its extension — so a PNG that somebody renamed logo.eps to look professional still gets caught.

Your file never leaves your computer. Every check runs in the browser — nothing is uploaded, stored, or logged.

EPS is the one exception, because it's an old format that's hard to read without rendering it. Even then, the private in-browser check runs first; only if you click "Run full check" is the file converted in memory on the server and deleted immediately. Nothing is kept.

The whole site is prerendered to real static HTML, so Google and the AI crawlers — which mostly don't run JavaScript — can actually read the guides and answer questions with them. It's a React and TypeScript app that hydrates on top of that static shell.

It runs entirely on Cloudflare: the site and its API are a Worker, and the optional EPS check is a small container running Ghostscript, spun up only when someone asks for it.