How it works
HEIC (High Efficiency Image Container) is the default photo format on Apple devices since iOS 11 and macOS High Sierra. It uses the HEVC (H.265) codec to compress images, delivering roughly 50% smaller file sizes compared to JPEG while preserving the same perceptual quality. Apple adopted HEIC to save storage space on iPhones and iPads without sacrificing the visual detail that users expect from their camera roll.
Despite its efficiency, HEIC poses a compatibility challenge. Windows 10 requires a paid codec from the Microsoft Store, most Linux image viewers cannot open it natively, and many web platforms refuse HEIC uploads altogether. This makes converting to a universal format like PNG essential for sharing or editing on non-Apple systems.
Quick & easyPrivacy & security
Every HEIC-to-PNG conversion happens entirely inside your browser using WebAssembly. Your photos are decoded and re-encoded in local memory — they are never uploaded to a server, never stored in a cloud, and never seen by anyone but you. There is no network request involved in the conversion itself.
This architecture means you can use AwesomeToolkit on sensitive photos — medical images, legal documents, personal memories — with complete confidence. Even if your internet connection drops mid-conversion, the process continues because it runs on your own device. When you close the tab, all data is discarded from memory.
100% browser-based