Image File Formats: JPG, PNG, WebP and SVG Compared
Choosing the wrong format is one of the most common ways good design ends up looking bad: a blurry logo, a bloated page, a photo with ugly artifacts, or transparency that turns into an unwanted white box. The four image file formats you will use almost every day, JPG, PNG, WebP, and SVG, each solve a different problem, and using the right one is the difference between crisp, fast images and slow, blurry ones. This guide explains what each format is best at and gives you a clear rule for which to reach for.
Raster vs Vector: The Most Important Distinction
Before the individual formats, understand the one split that determines everything else. Raster images are grids of pixels; vector images are mathematical descriptions of shapes.
- Raster (JPG, PNG, WebP): made of pixels, so they have a fixed resolution. Scale them up beyond their native size and they go blurry or blocky. Perfect for photographs and anything with complex, continuous color.
- Vector (SVG): made of paths defined by math, so they scale to any size, from a favicon to a billboard, with zero loss of quality. Ideal for logos, icons, and illustrations with flat color and clean edges, but unsuitable for photographs.
If you remember one rule, it is this: photographs are raster, logos and icons are vector. For a deeper look at why vectors scale infinitely, see our explainer on what vector graphics are.
JPG: For Photographs
JPG (or JPEG) uses lossy compression, it permanently discards some image data to shrink file size, and it is tuned for photographs and complex images with smooth gradients. The trade-off is quality: at high compression you get visible “artifacts,” blocky smudges around edges and in flat areas. JPG does not support transparency.
Use JPG for photos and detailed imagery where small file size matters and a transparent background is not needed. Avoid it for logos, text, and graphics with sharp edges, where its compression makes edges look dirty, and avoid re-saving a JPG repeatedly, since each save loses more data.
PNG: For Graphics and Transparency
PNG uses lossless compression, it preserves every pixel exactly, and it supports full transparency (an alpha channel). That makes it the right choice for graphics with sharp edges, screenshots, and anything that needs a transparent background, like a logo placed over a colored area. The cost is file size: a PNG of a photograph is far larger than the equivalent JPG.
Use PNG for logos, icons, screenshots, and graphics with text or hard edges, and whenever you need transparency. Do not use it for large photographs, where the file size is wasteful and JPG or WebP serves better.
WebP: The Modern Web Format
WebP is a modern format designed for the web that supports both lossy and lossless compression and transparency, effectively combining the strengths of JPG and PNG. At comparable quality it typically produces noticeably smaller files than either, which means faster pages and better performance scores. It is supported across all current major browsers.
Use WebP as your default for images on the web, photos and graphics alike, where browser support allows. The main caveat is outside the browser: some older software and print workflows do not handle WebP, so keep a JPG or PNG master for those uses. For web delivery in 2026, WebP should usually be your first choice.
SVG: For Logos, Icons, and Illustrations
SVG is a vector format written in XML, which means it scales to any size without losing sharpness and the files are often tiny. It can be styled and animated with CSS, made interactive, and even edited in a text editor. It is the correct format for logos, icons, and flat illustrations on the web. SVG is the wrong tool for photographs, which have no clean paths to describe.
Use SVG for any logo, icon, or simple illustration on a website, it will be crisp on every screen and at every size, including high-density displays where raster icons look soft. One caution: SVGs can contain scripts, so sanitize SVG files from untrusted sources before using them on a live site.
Quick Comparison
| Format | Type | Transparency | Best for | Avoid for |
|---|---|---|---|---|
| JPG | Raster (lossy) | No | Photographs | Logos, text, hard edges |
| PNG | Raster (lossless) | Yes | Graphics, screenshots, transparency | Large photographs |
| WebP | Raster (both) | Yes | Most web images | Print, older software |
| SVG | Vector | Yes | Logos, icons, flat illustration | Photographs |
How to Choose, in One Sentence
Photograph for the web: WebP, with a JPG fallback. Logo or icon: SVG, with a PNG fallback where SVG is not supported. Graphic needing transparency outside the browser: PNG. Photograph for print or legacy software: high-quality JPG. Get those four decisions right and you avoid almost every format mistake.
Image formats are one branch of a larger topic, choosing the right file type for the job. Logos in particular ship in several formats for different uses; see our guides to logo file formats and, for type specifically, font file formats explained.
Frequently Asked Questions
What is the best image format for websites?
For most web images in 2026, WebP is the best choice, it supports lossy and lossless compression plus transparency and produces smaller files than JPG or PNG at similar quality, which speeds up pages. Use SVG for logos and icons, and keep JPG or PNG versions as fallbacks for software that does not support WebP.
What is the difference between JPG and PNG?
JPG uses lossy compression and no transparency, making it ideal for photographs where small file size matters. PNG uses lossless compression and supports transparency, making it better for logos, screenshots, and graphics with sharp edges or transparent backgrounds. PNG photos are much larger than JPG, so match the format to the content.
Why does my logo look blurry when I scale it up?
It is almost certainly a raster file (JPG or PNG), which is made of fixed pixels and goes blurry when enlarged beyond its native size. Use an SVG, a vector format that scales to any size with no loss of quality. Always keep logos in vector format and export raster versions only as needed.
When should I use SVG instead of PNG?
Use SVG for logos, icons, and flat illustrations on the web, it stays perfectly sharp at any size and on high-density screens, and the files are often tiny. Use PNG when you need a raster image with transparency, such as a logo over a complex background, or for software that does not support SVG.
