HEIC 转 JPG

What is HEIC?

HEIC (High Efficiency Image Container) is a modern file format used by Apple on iPhones and iPads starting with iOS 11. It uses advanced compression algorithms to store high-quality photos in about half the file size of a standard JPEG. While great for saving storage on your phone, HEIC files often cause compatibility issues when you try to open them on older Windows PCs, Android devices, or specific web applications.

Why iPhones use HEIC

Apple adopted HEIC to solve the problem of high-resolution cameras filling up device storage. By using the HEVC (High Efficiency Video Coding) standard for still images, iPhones can capture better dynamic range and more color detail while maintaining a small footprint. However, because it is a relatively new format, it is not yet universally supported by all software and social media platforms.

HEIC vs. JPG vs. WebP

• HEIC: Best for storage efficiency and quality on Apple devices, but poor compatibility elsewhere.
• JPG (JPEG): The global standard. It works on every device, browser, and software but has larger file sizes and lower color depth.
• WebP: A modern web format that offers superior compression to JPG while being supported by all modern browsers.

Local-first Privacy Model

Most "HEIC to JPG" websites require you to upload your personal photos to their cloud servers. This exposes your private data to potential leaks or storage on their disks. ConvertUnlimited is different. Our tool uses a client-side HEIC decoder that runs entirely inside your browser's memory. Your photos never leave your device, ensuring 100% privacy and lightning-fast batch processing.

Batch HEIC Conversion

Need to convert an entire vacation gallery? Our tool supports bulk processing. Simply drag in dozens of HEIC files, choose your output format (we recommend JPG for compatibility or WebP for web performance), and hit "全部转换." You can then download your images individually or as a single organized ZIP archive.

Frequently Asked Questions

Can I open HEIC on Windows?

Newer versions of Windows 10 and 11 support HEIC if you install specific extensions, but converting to JPG is often the easiest way to ensure you can share photos with others without them needing to install extra software.

Will my photos lose quality?

Converting from one lossy format (HEIC) to another (JPG) always involves a technical quality trade-off. However, by using high-quality re-encoding (90%+), the difference is usually invisible to the human eye.

Why is it free?

Because the conversion happens on your computer's CPU, we don't have to pay for expensive cloud processing servers. We keep our costs low and pass that benefit to you.

Browser Support

This tool works in all modern browsers supporting the HTML5 Canvas API and WebAssembly, including Chrome, Firefox, Safari, and Edge.

Privacy Policy

Your Photos: We do not collect, store, or transmit any images you process. All conversion tasks are strictly local to your machine.

Analytics: We use Google Analytics 4 to monitor site traffic. This data is anonymized and does not include your file content or metadata.

Advertising: We use Google AdSense to display ads. These partners may use cookies to serve relevant ads based on your browsing history.

Terms of Use

ConvertUnlimited is provided "as is" without warranty of any kind. You are responsible for the content you process and must ensure you have the legal right to use and convert the images you provide. We are not liable for any data loss resulting from the use of this tool.