Your iPhone saves photos as HEIC — and Windows, older Android phones and most upload forms still can't open them. Convert one HEIC photo, or a whole batch, to JPG in seconds.
Multiple files welcome — converted locally, never uploaded
HEIC is the default photo format on iPhones since iOS 11, and it stores a photo in roughly half the space of a JPG. The catch is compatibility: most Windows PCs, many Android phones, photo-printing services, ID and visa portals, and plenty of website uploaders still reject HEIC files — and no desktop browser can even display them natively. JPG opens everywhere, so converting back to JPG is the reliable fix when a photo "won't open" or a form says the format is not supported.
Unlike most HEIC converters, this tool never uploads your photos to a server. When you pick your first file, a small HEIC decoder (the open-source libheif library, compiled to WebAssembly) loads once into your browser, decodes each photo on your own device, and re-encodes it as a high-quality JPG (quality 0.92). Your photos never leave your device, and there is no queue, no daily cap and no watermark.
1. Get the HEIC files onto this device. Transfer the photos from your iPhone exactly as they are — by cable, a USB stick, a cloud drive download or any method that does not convert them first — so you are converting the full-quality originals. 2. Add them above. Drop the files onto the box, or click and select them; on the first file the decoder loads once, which takes a few seconds. 3. Download the JPGs. Each finished row becomes a download button showing the new size. The converted JPGs open on any Windows PC, Android phone, printer or upload form, and your original HEIC files stay untouched.
If you share photos with Windows users or upload to forms often, you can make the iPhone shoot JPG directly: open Settings → Camera → Formats and choose Most Compatible instead of High Efficiency. Photos and videos then save as JPG and MOV, which everything accepts — at the cost of roughly double the storage for the same shots, which is exactly the saving HEIC was giving you. A gentler middle path also exists in Settings → Photos, where the transfer option can convert photos automatically when they are copied to a PC, while the phone itself keeps storing the smaller HEIC originals. Either way, photos already taken stay HEIC until converted — which is what the tool above is for.
Expect the JPG to be noticeably larger than the HEIC — often close to double — because HEIC is simply the more efficient format, and that difference is the price of a file that opens everywhere. Nothing about the larger size means better quality: the JPG is a fresh encode of the same picture at quality 0.92, chosen so the result is visually identical for normal viewing, printing at ordinary sizes and uploading anywhere. One sensible habit: keep the HEIC original as your archive copy even after converting. It is the smallest, highest-quality master you have, and if a future device or service wants the original, you still have it.
The first file is slow. That is the one-time decoder download described in the FAQ below; it is cached afterwards, so the rest of the batch moves quickly. A file failed to convert. Occasionally a photo is saved with a .heic name but a different internal format — for example after passing through a messaging app. Re-export or re-transfer that one photo directly from the iPhone's Photos app and try the fresh copy. Converting on a phone struggles with a big batch. Decoding large photos takes memory; split the batch into groups of a handful of photos at a time, which the converter handles comfortably. The photo opens but a form still rejects it. Check the form's own size limit as well as its format rule — if the converted JPG is over a KB cap, run it through the Exact-KB Compressor on this site to hit the exact size requested.
Will the JPG be bigger than the HEIC? Usually yes — often close to double. HEIC is a much more efficient format, and that space saving is exactly what you trade for a file that opens everywhere.
Will quality drop? JPG is lossy, so a re-encode is never perfectly identical — at quality 0.92 the difference is invisible for normal photos.
What about Live Photos and bursts? A HEIC file can hold more than one image; this converter exports the main photo, which is the one you see in your gallery.
Why does the first conversion take a moment? The decoder loads once (a one-time download of about 2 MB) and is then cached by your browser. Later conversions on this page are fast.
Is there a file limit? No account and no daily cap. Very large batches are limited only by your device's memory — on a phone, converting a handful at a time works best.