HEIC to JPG Offline Converter

Convert iPhone HEIC & HEIF photos to JPEG — entirely in your browser. No upload, no server, no account. Your photos never leave your device.

🔒 100% offline — zero network requests
📷
Drop HEIC / HEIF files here
or click to select files from your device

How it works

Everything runs inside your browser using WebAssembly — no data ever touches a server.

1. heic2any decodes HEIC A WebAssembly build of libheif reads the HEIC/HEIF container and yields raw pixel data for each image, including Live Photo stills.
2. Canvas resizes (optional) If you chose a max dimension, the browser's Canvas API downscales the image while preserving aspect ratio — before re-encoding.
3. JPEG encoding canvas.toBlob('image/jpeg', quality) encodes the pixels to a JPEG at your chosen quality (50–100%). Higher = larger file, sharper detail.
4. Download or ZIP Each file gets its own download button. If you converted multiple files, JSZip bundles them into one .zip for a single click.

Privacy note: Your photos are processed in memory and discarded when you leave the page. No analytics, no cookies, no network requests are made during conversion.

Frequently asked questions

What is HEIC and why can't Windows / older apps open it?
HEIC (High Efficiency Image Container) is Apple's default photo format since iOS 11. It uses the HEVC (H.265) codec to store roughly twice the detail of JPEG at the same file size. However, Windows requires a paid codec pack to open HEIC natively, and many web apps, social platforms, and older software only accept JPEG or PNG. Converting to JPG is the quickest way to make iPhone photos universally compatible without quality loss visible to the naked eye.
Does the conversion actually happen offline, or is my photo uploaded somewhere?
It is genuinely offline. The heic2any library is a WebAssembly module that runs entirely inside your browser tab — the same way a desktop app would run on your machine. After the page loads, you can disconnect from the internet and the converter will still work. You can verify this yourself by opening your browser's developer tools (Network tab) and watching for any outgoing requests during conversion: there will be none.
What quality setting should I use?
85% is a good default — it retains excellent visual quality while keeping file sizes manageable (typically 30–60% smaller than 100%). Choose 90–100% for photos you plan to print or edit further. Choose 70–80% for sharing on social media or via email where file size matters. Below 70% you will start to see visible JPEG compression artifacts, especially on smooth gradients and fine text.
What does the "Max dimension" option do?
iPhone cameras can produce photos up to 4032 × 3024 pixels or larger. If you only need web-sized images, resizing to 2048 px on the longest edge reduces the file to roughly one-quarter the area — dramatically cutting file size with little visible difference on screens. The aspect ratio is always preserved. Select "No resize" to keep the full original resolution.
Can I convert multiple files at once?
Yes. Select or drag multiple HEIC files — there is no hard limit, though very large batches (50+ files at full resolution) may take a minute depending on your device. Each file is converted sequentially. When all are done, the "Download all as ZIP" button appears so you can grab everything in one click.