SVG vs JPG: A Decision Guide

SVG and JPG are not really competitors. They solve completely different problems: JPG compresses millions of subtly varying coloured pixels into a small file; SVG describes geometric shapes as mathematical instructions. Any “which is better” question is really a “what kind of artwork are you trying to ship” question, and once you answer that the format choice is mechanical.

The short answer

Use JPG for photographs. Use SVG for everything that started as vector artwork: logos, icons, line illustrations, charts, diagrams, and anything with text in it. The grey zone — paintings, dense illustrations, screenshots — depends on detail and target size, but in 2026 the answer there is usually “PNG, WebP, or AVIF,” not JPG.

The fundamental difference

JPG is a raster format. The file contains a grid of pixels (compressed using a clever frequency-domain transform), and the browser’s job is just to decode the pixel grid and paint it. The format is opaque to scaling — when you display a 500×500 JPG at 1000×1000, the browser interpolates between the existing pixels and the result looks blurry.

SVG is a vector format. The file contains a set of mathematical instructions: “draw a circle of radius 50 at coordinate (100, 100), filled with black.” The browser rasterises that to whatever resolution your screen needs. A 500×500 SVG and a 2000×2000 SVG are usually the same file; only the rendering changes.

That difference is decisive. If your artwork is fundamentally a field of pixels (a photograph), SVG is the wrong tool. If your artwork is fundamentally a set of shapes (a logo), JPG is the wrong tool. Trying to use the wrong tool produces predictably bad results: a JPG of a logo has visible compression artefacts around the edges and looks blurry on Retina screens; an SVG of a photograph requires tens of thousands of path commands and is larger than the JPG would be.

When JPG is right

JPG’s sweet spot is photographic content: real-world scenes, portraits, product photography, art reproductions. The format’s DCT compression is specifically designed for the kind of smooth gradients and continuous tones that cameras produce, and it discards high-frequency information your eye is bad at noticing — that trade-off is what gets a 12-megapixel photo down to 800 KB instead of 36 MB.

For photographs:

• JPG is the floor. It’s the universal fallback that every browser, email client, CMS, and operating system understands.
• WebP is 25–35% smaller than JPG at equivalent quality. Universal browser support since 2020.
• AVIF is another 20–30% smaller than WebP, with slightly weaker browser support but excellent quality at low bitrates.

The 2026 best practice for photographs is to use the <picture> element to serve AVIF to browsers that support it, WebP as fallback, and JPG as the universal floor:

<picture>
  <source type="image/avif" srcset="hero.avif" />
  <source type="image/webp" srcset="hero.webp" />
  <img src="hero.jpg" alt="..." width="1200" height="800" />
</picture>

When SVG is right

SVG wins decisively for any artwork built from geometric primitives. The canonical use cases:

• Logos. Always SVG. The whole point of a logo is that it’s recognisable at any size, from a 16-pixel favicon to a billboard. JPG cannot do that. Even at the same display size, JPG compression artefacts on a logo’s sharp edges look unprofessional.
• Icons. Always SVG. Modern interfaces are full of them. They need to be sharp on every display, recolourable via CSS, and small. SVG checks every box; even tiny optimised PNG icon sets are usually larger than equivalent SVG.
• Charts and graphs. Almost always SVG. D3, Chart.js, ECharts, Plotly — they all output SVG by default for a reason. The data points are vector by nature, and you want the chart to be legible whether it’s embedded at thumbnail size or full-screen.
• Line illustrations. Editorial illustrations, decorative dividers, hand-drawn-style ornaments — anything that started in Illustrator or Figma. Vector by origin, vector by destination.
• Anything with text in it. Text in a JPG is at the mercy of compression artefacts and screen scaling. Text in SVG stays sharp, can be selected and copied, and is indexed by search engines.
• Anything that needs transparency. JPG has no alpha channel. If you need a logo on a coloured background or a cutout overlay, JPG is not an option.
• Anything you want to animate. See our guide to animating SVG — you cannot animate a JPG without replacing it with another JPG.

The grey zones

Screenshots

Pure UI screenshots with sharp text and flat colours: PNG (or WebP) is best. JPG ruins the text. SVG would technically work but screenshot-to-SVG converters are unreliable and the file usually ends up larger than a PNG.

Mixed screenshots that include photos (a website screenshot of a gallery page): JPG or WebP, accepting some text degradation in exchange for size. Or a hybrid: SVG for the chrome, embedded JPG for the photographic content.

Detailed digital paintings

Pixel-level brushwork, painted illustrations, anything with the texture of digital paint: raster (JPG, WebP, or PNG depending on colour count and transparency needs). SVG can technically be generated by tracing, but the result is often larger than a raster equivalent and loses subtle texture.

Maps

Static maps: SVG if you can get vector tile data, raster otherwise. Most modern mapping libraries render to canvas or WebGL because the shape count is too high for SVG to be performant.

Hero images on marketing sites

The classic large hero photo: JPG/WebP/AVIF. The classic large illustration hero: SVG, almost always. If you’re in doubt, look at the source: was it photographed or was it drawn?

File sizes you can actually expect

Some real numbers from common assets, all served at high quality and modern compression settings:

• 32×32 line icon: SVG ~300 bytes optimised, ~1.2 KB unoptimised. JPG ~800 bytes (with visible artefacts). Verdict: SVG, by a lot.
• Logo at 200×60: SVG ~700 bytes. JPG ~6 KB (visible compression on the curved edges). Verdict: SVG.
• Pie chart with 4 slices and labels: SVG ~2 KB. JPG ~30 KB. Verdict: SVG.
• Photo of a product, 1200×800: SVG would be multi-megabyte (or impossible). JPG ~140 KB at 80% quality. Verdict: JPG (or WebP at ~95 KB).
• Detailed editorial illustration, 1200×800: SVG ~50 KB if hand-drawn cleanly, possibly 500 KB if traced from a raster source. JPG ~180 KB. Verdict: SVG if it was authored as vector; raster if it was painted.

Performance and Core Web Vitals

For Lighthouse and Core Web Vitals (LCP in particular), the format mostly matters as a function of file size. SVG icons rendered inline in HTML cost nothing extra in HTTP requests; JPG hero images dominate the LCP measurement, which is why most performance optimisation work on marketing sites is “make the hero JPG smaller and load it faster.”

One subtle SVG advantage: because SVG is text, it gzips and brotlis extremely well. A 4 KB SVG often ships in 1.2 KB on the wire. JPG and other compressed image formats do not benefit from HTTP compression because they’re already compressed.

The summary

You almost never need to actually compare JPG and SVG, because the right answer is dictated by the source artwork. Photos are JPG (or WebP, or AVIF). Vector artwork is SVG. The rest is a flow chart of edge cases, all of which collapse back to the same principle.

The mistake to avoid: shipping screenshots of vector artwork as JPGs because that’s what your screenshot tool produces. If you have the SVG source, ship the SVG source. The browser will thank you, your users will thank you, and Google’s Core Web Vitals will thank you.

Related on svg.dog: SVG vs PNG for the other big raster comparison and SVG vs WebP for the modern equivalent of this article.