Convert HEIC to JPG without uploading the photo. HEIC is what an iPhone saves by default, and it is the format that quietly fails when you attach a picture to an insurance claim, a rental application or a government upload form that only accepts JPEG. This converts it locally: in Sensitive mode the decode and the re-encode both happen in your browser tab, so a photo of a document, a medical letter or a child never reaches our servers at all.
How to use HEIC to JPG
- Choose your privacy mode. Sensitive converts the photo on this device; Ordinary uploads it to our server, which is useful for very large bursts.
- Select a .heic or .heif file — including the multi-image files iPhones produce for Live Photos and burst shots.
- Optionally adjust JPEG quality. The default suits photographs; raise it for images you intend to print.
- Click Process. A single-image file becomes one .jpg. A multi-image file gives you every frame — zipped together in Sensitive mode, as separate downloads in Ordinary mode.
Worked example
An iPhone photo of a signed contract that a claims portal refuses
You photograph a signed contract on an iPhone and the insurer's upload form rejects it: the file is HEIC and the form wants JPEG or PDF. The obvious fix is the first free HEIC converter in the search results, which means uploading a signed contract to a company you have never heard of. Instead, choose Sensitive mode here. libheif decodes the HEIC inside your browser tab and MozJPEG re-encodes it as a JPEG, with the rotation already applied — HEIC stores orientation as a transform the decoder performs, so the output is upright rather than sideways, which is the usual failure of naive converters. Nothing is uploaded; you can confirm that in the Network tab before you trust it.
Processing limits & specifications
| Mode | Location | Max file size | Retention |
|---|---|---|---|
| Sensitive mode | Your device (WASM) | Up to 75 MB (typical device) | Never stored / zero egress |
| Normal mode | Server sandbox | 200 MB | Deleted when you close the page |
Frequently asked questions
Can I convert HEIC to JPG without uploading the photo?
Yes. In Sensitive mode the conversion runs entirely in your browser tab. Open the Network tab, convert a photo, and you will see no request carrying it — the page's Content-Security-Policy blocks outbound connections outright.
Why won't my iPhone photo open on Windows or in a web form?
iOS saves HEIC by default. It is smaller than JPEG at the same quality, but many upload forms, older Windows builds and plenty of web apps do not accept it. Converting to JPEG makes the file universally readable.
What happens to Live Photos and burst shots?
Those are multi-image containers. Every frame is converted — delivered as a single zip in Sensitive mode, or as separate outputs in Ordinary mode. There is a cap of 20 images per file.
Will the photo come out sideways?
No. HEIC records orientation as a transform the decoder applies, so the pixels come out already upright. Converters that treat it like JPEG's orientation tag and rotate a second time are the ones that produce sideways output.
Is it free? Any signup, watermark or limit?
Free, no account, no email, no watermark. Convert as many as you like.
Does the colour profile survive?
On the server path the embedded ICC profile is preserved. On the device path it is not — the WebAssembly build of libheif exposes no metadata accessor at all, so rather than claim otherwise we say so plainly.
Is location data carried over?
No. Metadata including GPS coordinates is stripped by default, so where the photo was taken does not travel with the JPEG.
Does it work offline?
Yes, once the page has loaded. Sensitive mode makes no network requests, so it keeps working on a plane or a hotel connection that has stopped cooperating.
How large a file can it handle?
The limit depends on your device's memory class and is shown on the page before you pick a file. Very large bursts are better suited to Ordinary mode.
Is HEIC better than JPEG?
At equal quality HEIC files are roughly half the size, which is why Apple adopted it. JPEG's advantage is that everything, everywhere, opens it — which is the only thing that matters when a form is rejecting your upload.