JPG vs PNG vs WEBP: Which Image Format Should You Use?

Choosing the wrong image format is one of the most common mistakes made by South African website owners, social media managers, and small business owners. Using a PNG where a JPG would do can make your file 4× larger than necessary; using a JPG for a logo will produce visible artefacts and a degraded appearance. This guide explains when to use each format.

The Three Main Web Image Formats

JPG / JPEG (Joint Photographic Experts Group)

JPG uses lossy compression — it permanently discards some image data to achieve smaller file sizes. The compression is designed to be imperceptible at standard quality settings, but at high compression rates, "artefacts" appear as blocky distortions, especially around text and sharp edges.

Best for: Photographs, product images, anything with continuous tonal gradients, background images, and any image where file size matters more than pixel-perfect accuracy.

Avoid for: Logos, icons, text, screenshots, images needing transparent backgrounds, and anything that will be further edited.

Typical file size: A 1000×1000 photograph at 80% quality is typically 80–200 KB.

PNG (Portable Network Graphics)

PNG uses lossless compression — it never discards any image data. The file size is larger than JPG, but quality is preserved perfectly. PNG also supports full transparency (alpha channel), making it the standard for logos, icons, and images placed over coloured backgrounds.

Best for: Logos, icons, illustrations, screenshots, images with text overlaid, images needing transparent backgrounds, and any image that will be further edited.

Avoid for: Large photographs on websites (the file size will be enormous compared to JPG at equivalent visual quality).

Typical file size: The same 1000×1000 photograph as PNG could be 800 KB–3 MB.

WEBP (Web Picture)

WEBP is a modern format developed by Google. It achieves significantly better compression than both JPG and PNG while maintaining equivalent visual quality, and it supports both lossy and lossless compression as well as transparency. All modern browsers support it.

Best for: All web images where you want the best file size. WEBP versions of JPG photos are typically 25–35% smaller; WEBP versions of PNG graphics are typically 20–30% smaller.

Limitation: Some older Windows applications (Microsoft Office versions before 2019, older Photoshop), some print workflows, and some social media platforms when uploading do not support WEBP. Use JPG or PNG when sharing outside web contexts.

Quick Decision Guide

GIF: When (and When Not) to Use It

GIF (Graphics Interchange Format) supports animation, which is why it survives. However, GIF is limited to 256 colours per frame and produces large file sizes for animations. For web animations, consider CSS animations or MP4 video. For static images, GIF is almost never the right choice — use PNG instead.

SVG: The Vector Option

SVG (Scalable Vector Graphics) is a fundamentally different format — it stores mathematical descriptions of shapes rather than pixels. SVG logos and icons scale perfectly to any size without loss of quality, and file sizes are often smaller than PNG equivalents. All modern browsers support SVG. If your designer provides your logo as an SVG file, use it for all web and screen contexts.

How to Convert Between Formats for Free

FreeToolVault's Image Converter lets you convert between JPG, PNG, and WEBP instantly in your browser:

1. Go to FreeToolVault Image Converter
2. Upload your image
3. Select your target format
4. Click "Convert & Download"

Note: Converting a JPG to PNG does not restore quality lost in the original JPG compression. Always work from the highest-quality source file. Converting PNG to WEBP for web use, or converting JPG to WEBP, will produce a smaller file at equivalent quality.

🔄 Convert Your Image Free →