Compare Scalable Vector Graphics and High Efficiency Image formats — understand the key differences and when to use each
Scalable Vector Graphics
SVG (Scalable Vector Graphics) is an XML-based vector image format developed by the W3C. Unlike raster formats (JPG, PNG), SVG describes images using mathematical paths, shapes, and text, allowing them to scale to any size without quality loss — from a tiny icon to a billboard. SVG supports styling via CSS, animation via SMIL or JavaScript, interactivity, accessibility features, and embedded fonts. SVG files are typically much smaller than raster equivalents for logos, icons, and illustrations. Because SVG is text-based, it can be indexed by search engines, edited in any text editor, and manipulated with JavaScript in web applications. SVG supports filters, gradients, patterns, clipping, and masking. It's the standard format for web icons, logos, data visualizations (D3.js, Chart.js), and responsive graphics. All modern browsers natively render SVG.
High Efficiency Image
HEIC (High Efficiency Image Container) uses the HEVC (H.265) video codec for image compression, providing approximately 50% better compression than JPEG at equivalent quality. Apple adopted HEIC as the default photo format for iOS 11+ and macOS High Sierra+ devices. A single HEIC file can contain multiple images (like burst photos or Live Photos), depth maps, alpha channels, and HDR content. HEIC supports 16-bit color depth and wide color gamut (P3), resulting in more vibrant and detailed photos than JPEG. However, HEIC has limited compatibility outside the Apple ecosystem — many Windows applications, web browsers, and social media platforms require JPEG or PNG. Converting HEIC to JPG or PNG ensures universal compatibility while preserving image quality.
| Feature | SVG | HEIC |
|---|---|---|
| Full Name | Scalable Vector Graphics | High Efficiency Image |
| File Extension | .svg | .heic |
| Category | image | image |
| Free to Convert | ✓ Yes | ✓ Yes |
| Browser Support | ✓ All Browsers | ✓ All Browsers |
| Convert to Each Other | ✓ Yes | ✓ Yes |
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