Pick the format based on the job
There is no single best image format. JPG is still useful for photos and broad compatibility. PNG is strong for screenshots, icons, transparency, and sharp edges. WebP is a good default for modern web delivery. AVIF can be smaller, but compatibility and encoding speed still matter. SVG is best for simple vector graphics, not photos.
The right choice depends on what the image contains and where it will be used. A product photo, a UI screenshot, a transparent logo, and a printable PDF page all need different tradeoffs.
- Use JPG for photos when broad compatibility matters.
- Use PNG for transparency, text-heavy screenshots, and lossless editing copies.
- Use WebP or AVIF for optimized website delivery when supported.
- Use SVG for scalable icons, logos, and simple illustrations.
Quality, transparency, and file size
Lossy formats such as JPG, WebP, and AVIF reduce file size by discarding some visual detail. Lossless formats such as PNG keep exact pixels but can be larger. Transparency support also matters: PNG, WebP, AVIF, and SVG support transparency, while standard JPG does not.
For public websites, test the final image at the size it will actually be displayed. A perfect high-resolution PNG can be the wrong choice if it slows the page and hurts user experience.
Search and page speed considerations
Images can help search traffic when they load quickly, have descriptive filenames, and appear on useful pages. Large unoptimized images do the opposite: they slow down pages, increase bounce rate, and can weaken Core Web Vitals.
For SEO pages, keep the original master image, export a web-sized version, compress it, and use a modern format where your audience can view it reliably.