The Complete Guide to Image Formats: JPG, PNG, WebP, AVIF & More

Choosing the right image format can make or break your website's performance, print quality, or design workflow. This guide covers every major image format, explaining when and why to use each one.

Raster vs. Vector Formats

Raster images (JPG, PNG, WebP) store pixel data — perfect for photography and complex visuals. They lose quality when scaled up. Vector images (SVG, AI, EPS) store mathematical paths — ideal for logos, icons, and illustrations because they scale to any size without quality loss.

JPEG / JPG

The most widely used image format on the web. JPEG uses lossy compression, discarding some visual information to achieve dramatically smaller file sizes. Best for photographs and complex images with millions of colors. Not suitable for graphics with sharp edges, text, or transparency.

• Compression: Lossy (adjustable quality 1–100)
• Colors: 16.7 million (24-bit)
• Transparency: Not supported
• Animation: Not supported
• Best for: Photos, backgrounds, social media images

PNG

PNG offers lossless compression, preserving every pixel perfectly. It supports transparency (alpha channel), making it essential for logos, UI elements, and any graphic overlaid on different backgrounds. PNG files are significantly larger than JPEGs for photographic content.

• Compression: Lossless
• Colors: Up to 48-bit (trillions of colors)
• Transparency: Full alpha channel
• Animation: APNG only (limited support)
• Best for: Logos, icons, screenshots, graphics with text

WebP

Developed by Google, WebP provides both lossy and lossless compression that is typically 25–35% smaller than JPEG/PNG at equivalent quality. It supports transparency and animation. As of 2026, all major browsers support WebP, making it the go-to choice for web images.

• Compression: Lossy or lossless
• Transparency: Supported
• Animation: Supported
• Browser support: 97%+ globally
• Best for: All web images — it's the modern default

AVIF

Based on the AV1 video codec, AVIF delivers even better compression than WebP — up to 50% smaller than JPEG. It supports HDR, wide color gamut, and both lossy and lossless modes. Encoding is slower, but for static web images the size savings are compelling.

• Compression: Lossy or lossless, superior to WebP
• Colors: HDR, wide gamut support
• Browser support: ~92% (Chrome, Firefox, Safari 16.4+)
• Best for: Images where maximum compression matters

GIF

GIF is a legacy format limited to 256 colors with basic frame-by-frame animation. It uses lossless compression but produces large files for animations. For static images, PNG is always better. For animations, consider WebP or MP4 video instead — both offer far smaller files with better quality.

HEIC / HEIF

Apple's default photo format since iOS 11, HEIC (High Efficiency Image Coding) offers ~50% smaller files than JPEG with better quality. Supports HDR, depth maps, and burst photos in a single file. The main drawback is limited support outside the Apple ecosystem — most users need to convert HEIC to JPG or PNG for sharing.

SVG

Scalable Vector Graphics uses XML to describe shapes, making files resolution-independent. Perfect for logos, icons, and simple graphics. SVG files can be styled with CSS and animated with JavaScript. Not suitable for photographic content.

TIFF

The professional standard for print and archival. TIFF supports multiple color spaces (CMYK, Lab), layers, and lossless compression. Files are very large but preserve maximum quality. Used extensively in publishing, medical imaging, and GIS applications.

RAW Formats (CR2, NEF, ARW, DNG)

Camera RAW files contain unprocessed sensor data with maximum dynamic range and color depth. Each camera manufacturer has their own RAW format (Canon CR2, Nikon NEF, Sony ARW). Adobe DNG is an open standard that works across all software. RAW files must be processed before sharing.

Quick Reference: Which Format to Use

Convert Between Image Formats

Need to convert between any of these formats? Xonvert supports all of them — no software to install, no upload limits, works right in your browser.