What Is HEIC Format?
HEIC (High Efficiency Image Container) is an image format based on the HEIF (High Efficiency Image File Format) standard. Apple adopted HEIC as the default photo format on iPhones and iPads starting with iOS 11 in 2017. HEIC files use the HEVC (H.265) video codec for image compression, achieving roughly 50% smaller file sizes than JPEG at equivalent visual quality.
Why Convert HEIC Files?
Despite HEIC's superior compression, compatibility remains a major issue:
- Web browsers: Only Safari fully supports HEIC. Chrome, Firefox, and Edge cannot display HEIC images natively.
- Windows: Windows 10/11 requires installing the "HEVC Video Extensions" from the Microsoft Store (sometimes paid) to view HEIC files.
- Social media: Most platforms accept HEIC uploads but convert them server-side, which can reduce quality. Converting to JPEG yourself gives you control over the output quality.
- Email: Many email clients cannot display inline HEIC images. Recipients on non-Apple devices may see broken images or be unable to open attachments.
- Web development: HEIC is not supported as a web image format. You must convert to JPEG, PNG, or WebP for use on websites.
HEIC vs. JPEG vs. WebP
- HEIC: Best compression (~50% smaller than JPEG), supports 16-bit color, live photos, and image sequences. Limited compatibility outside Apple ecosystem.
- JPEG: Universal compatibility, good compression for photos, 8-bit color. The safe choice when you need maximum compatibility.
- WebP: 25-35% smaller than JPEG, supports transparency and animation. Supported by all modern browsers. The best balance of size and compatibility for web use.
- PNG: Lossless compression, supports transparency. Larger file sizes than JPEG/WebP for photos. Best for screenshots and images with text.
How This Tool Works
This converter uses a WebAssembly-based HEIC decoder that runs entirely in your browser. When you select a HEIC file, it is decoded locally and re-encoded in your chosen format (JPEG, PNG, or WebP) at your specified quality level. No data is sent to any server — your photos remain completely private.
Large HEIC files (10+ MB) may take a few seconds to process depending on your device's performance. The conversion is CPU-intensive because HEIC uses the complex HEVC codec for compression.