Convert HEIC to WebP
If the destination is a website rather than somebody's inbox, WebP is a better target than JPG. It holds on to most of the size advantage that made HEIC attractive in the first place — typically 25 to 35 percent smaller than a JPG of matching quality — while being decodable by every browser released in the last several years.
Files are decoded and re-encoded inside this browser tab. Nothing is uploaded — you can disconnect from the internet after this page loads and conversion still works.
This is the conversion to use when you are publishing iPhone photos to a blog, a product listing, or a portfolio and page weight matters.
How to convert HEIC to WebP
- Drag your HEIC files onto the box above, or click it to browse.
- Each file converts in place — no upload, no queue.
- Download them one by one, or grab the whole batch as a ZIP.
WebP support is no longer a concern
WebP was released by Google in 2010 and spent a long time as a format you could not safely rely on. That period is over. Chrome, Edge, Firefox, Safari and every mobile browser of consequence have supported it for years — Safari since version 14 in 2020, which was the last real holdout.
The remaining friction is not browsers but desktop software. Some older photo editors and a good deal of enterprise software still refuse WebP, which is why it is the right choice for web publishing and the wrong choice for a file you are emailing to a stranger.
Why not just serve the HEIC?
Browsers do not decode HEIC. Safari has partial support because Apple controls both ends, but Chrome and Firefox will not render a HEIC file at all, so it is unusable as a web image format despite its excellent compression. WebP is the closest thing to HEIC efficiency that browsers actually understand.
AVIF compresses better still and is now widely supported, but browsers cannot yet write AVIF from a canvas, so an in-browser converter cannot produce it. That is a genuine limitation of doing this without a server, not an oversight.
Transparency survives
Unlike JPG, WebP supports an alpha channel, so any transparency present in the source HEIC is carried through rather than flattened onto white. Animation is also part of the WebP specification, though nothing here produces animated output — a Live Photo yields a single still frame.
Frequently asked questions
Is WebP smaller than JPG?
For the same perceived quality, typically 25 to 35 percent smaller. The advantage is largest on images with flat areas and soft gradients, and smallest on dense photographic detail.
Will WebP open on my computer?
In any browser, yes. In desktop applications it varies — recent versions of Photoshop, GIMP, Affinity and the Windows Photos app handle it, while older software often does not. For maximum compatibility use JPG instead.
Does this upload my photos?
No. Everything runs locally in your browser. No image data leaves your device.
Can I get AVIF instead?
Not from an in-browser tool. Browsers can decode AVIF but cannot encode it via the canvas API, so producing AVIF requires server-side processing or a dedicated desktop encoder.
Is quality adjustable?
Conversion runs at quality 0.92, which is a deliberately conservative setting where WebP artefacts are not visible at normal viewing sizes.