PNG to HEIC

PNG stores every pixel exactly, so photographs saved as PNG are enormous — often 10× a HEIC of the same picture. If the image is a photo rather than a screenshot or a logo, HEIC gives you a far smaller file that still looks the same, and unlike JPG it keeps the alpha channel.

Yes. Transparent areas survive the conversion — HEIC stores the alpha channel alongside the picture. That is the practical difference from PNG to JPG, where transparency has to be flattened onto a background.

Both keep transparency, both have a quality slider and an exact file-size target here, and both are far smaller than PNG — so pick by where the file is going. WEBP is the web answer: every browser displays it. HEIC is the Apple answer: it is what an iPhone photo library expects, opens natively in Photos and Finder, and is usually the smaller of the two — but browsers cannot display it. Both are one click apart in the export menu, so it costs nothing to save the same picture twice and compare.

No. PNG is lossless; the HEIC written here is compressed with loss, which is where the size saving comes from. For a photo the difference is invisible in normal viewing; for line art, screenshots or text, stay with PNG — sharp edges are exactly what lossy compression handles worst. The export dialog does offer a "Lossless" tick for HEIC, and it is honest about what that means: the encoder stores colour at half resolution before the setting applies, so only brightness comes back exactly, and the file is roughly three times the size of quality 95 for a difference you will not see. If you need every pixel back, PNG is still the answer.

On Apple devices it opens everywhere. Windows 10/11 may ask for the HEIF Image Extensions from the Microsoft Store, and Android has opened HEIC natively since Android 10. If a site or app rejects it, convert the file back — HEIC to JPG is one page away.

No. Both the decoding and the HEIC encoding happen on your device, in a background thread of this page. Nothing is uploaded, which also means there is no queue and no file-size cap beyond your own browser’s memory.

No. PIXLFLW runs entirely in your browser: images are opened, edited and exported locally on your device and are never uploaded, stored or seen by anyone.

Yes, completely free — no sign-up, no watermarks and no daily limits. The only practical limit is your browser memory for very large files (up to 20 MB per image).