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The Complete Image Format Guide: JPG vs PNG vs WebP vs AVIF vs HEIC

Confused about image extensions? Learn the exact differences between JPG, PNG, WebP, AVIF, and HEIC so you always pick the right format for speed, quality, and storage.

📅 14 Sep 2026◷ 6 min readBy Pawan Nayak
Guides
With smartphones saving in HEIC, websites using WebP and AVIF, and cameras shooting in JPG and RAW, picking the right image format has never been more confusing. Using the wrong format can cause slow website loading, pixelated prints, or upload rejections on government portals. 1. JPEG / JPG: The Universal Photographic Standard JPG remains the undisputed king of compatibility. Every smartphone, desktop computer, gaming console, and browser created in the last 30 years natively opens JPG. It uses lossy compression tuned specifically for realistic photos, reducing file size by discarding data invisible to the human eye. 2. PNG: Lossless Clarity and Transparent Cutouts PNG (Portable Network Graphics) is a lossless format designed for graphics, screenshots, charts, and logos. Crucially, PNG supports transparent alpha channels, making it the standard choice for product images and website UI assets. 3. WebP and AVIF: Next-Generation Web Performance Developed by Google, WebP produces files 25% to 35% smaller than JPG while maintaining equivalent sharpness. AVIF, based on the AV1 video codec, pushes compression even further. If you run a blog or e-commerce shop, serving WebP or AVIF dramatically improves Google Core Web Vitals. 4. Apple HEIC: Storage Savings on iPhone Since iOS 11, iPhones shoot in HEIC by default. It preserves 16-bit color depth and Live Photo bursts in half the storage footprint of JPG. However, sharing HEIC to Windows or Android often requires converting to JPG first.
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Written by

Pawan Nayak

Founder of SimpleImageConvert.com, where they've spent 2+ years building free browser-based tools for image conversion, compression, and resizing. Having tested and optimized formats like JPG, PNG, and WEBP across thousands of real-world conversions, they write practical guides to help others make faster, smarter choices for their websites

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