How to Convert HEIC to PNG in Your Browser Without Uploading Files
You can convert HEIC to PNG entirely in your browser with a client-side converter like Konvert: the file is decoded and re-encoded on your own device, so nothing is uploaded and no account is needed. This works well when you want PNG's lossless editing or transparency support and you're okay with a larger file. It's a poor fit if you need to preserve HEIC's depth data, Live Photo motion, or original metadata, since a PNG export won't carry those over.
Why convert HEIC to PNG at all
HEIC (the format iPhones and many cameras use by default) compresses well but isn't universally supported. Older Windows builds, some Android apps, and many web tools can't open it. PNG solves the compatibility problem and adds two things HEIC doesn't give you in a normal export:
- Lossless editing — PNG uses lossless compression, so repeated open-and-save cycles in an editor don't degrade the image the way JPEG would.
- Transparency — PNG supports an alpha channel, useful if you plan to cut out a subject or composite the photo.
The trade-off is size. PNG is typically much larger than the original HEIC for the same photo, sometimes several times larger, because it isn't built for photographic compression.
Steps to convert HEIC to PNG locally
- Open the converter in a browser. Go to a client-side tool such as Konvert (knvrt.one). Because conversion runs in the browser, you don't need to install anything.
- Add your HEIC files. Select or drag the HEIC images into the tool. You can add multiple files at once.
- Choose PNG as the output format. The tool lists HEIC, WEBP, and AVIF as inputs; make sure the target is set to PNG rather than the default JPG.
- Start the conversion. Processing happens locally on your device, so it's usually a matter of seconds per image.
- Download the PNG files. Save them to your device. The originals stay untouched.
Expected result: a PNG copy of each photo that opens in any standard image viewer or editor. What to verify: check that the orientation looks right and the colors match the original, since these are the two things most likely to shift.
What stays private and what doesn't
With a client-side converter, your files never leave your device — there's no upload step, so there's no server copy and no transfer to intercept. Konvert states this directly: "Your files never leave your device, ensuring maximum privacy and security," and it runs with "no restrictions or accounts." That matters most for personal photos, ID documents, or anything you wouldn't want sitting on someone else's server.
The catch: if a tool does upload your file, the privacy claim doesn't hold. Before trusting any converter, check whether it processes locally or sends your image to a backend. A local tool will typically work with your network disconnected after the page loads.
Common problems and fixes
| Symptom | Likely cause | What to try |
|---|---|---|
| Conversion fails or the file won't load | Browser can't decode HEIC natively | Use a converter that bundles its own HEIC decoder, or try a different browser |
| Colors look washed out or shifted | Color profile not carried into the PNG | Re-check in an editor; convert from the original HEIC, not a re-saved copy |
| Photo appears rotated | EXIF orientation not applied on export | Rotate manually after conversion, or use a tool that bakes in orientation |
| Output file is huge | PNG's lossless compression on a photo | Accept it for editing, or export to JPG instead if size matters more than losslessness |
| Missing depth/Live Photo data | PNG doesn't store those HEIC features | Keep the original HEIC if you need them |
When PNG is the right target — and when it isn't
Choose PNG if you're heading into an editor, need transparency, or want a format that opens everywhere without quality loss. Choose JPG instead if you just want a smaller, shareable file and don't need transparency or lossless editing — for a typical iPhone photo, JPG will be far smaller than PNG. If your goal is simply "make this open on any device," JPG usually wins on size; PNG wins when fidelity or an alpha channel is the point.