Every common file format, explained

Portable Document Format — universal print/read format. Use for anything that must look identical everywhere.

Modern Word format. Editable, keeps styles. Convert it straight to a text-selectable PDF here, then merge, split or sign it.

E-book formats. EPUB is the open standard; MOBI/AZW3 are Amazon Kindle. Open them read-only in the browser.

Lossy photo format. Best for photographs, worst for text/UI.

Lossless with transparency. Best for logos, UI, screenshots.

Google's modern format. ~30% smaller than JPG at same quality.

Newest format. ~50% smaller than JPG, slower to encode.

Apple's iPhone default. Small but poor Windows/Web support — convert first.

Vector graphics as XML. Infinitely scalable.

Camera sensor dumps. Huge, need conversion for the web.

Universal archive. Every OS opens it natively.

Alternative archives — better compression, less native support.

Web font formats. WOFF2 is ~30% smaller than TTF for the same glyphs.