What is a HEIC file?
HEIC is the format iPhones and iPads have used for photos since iOS 11. Built on the HEVC video codec, it stores photos at roughly half the size of an equivalent JPG — but outside the Apple ecosystem support is patchy. Windows needs paid codecs, many websites reject HEIC uploads, and most printing services will not accept it.
In short, HEIC is Apple's iPhone photo format. It is best for staying on Apple devices — for everything else, convert it first. Its main limitations are poor support on Windows, Android, the web, and most upload forms; licensing restrictions keep adoption low.
Why convert HEIC to WebP?
WebP was created by Google to replace both JPG and PNG on the web. It supports lossy and lossless compression, transparency, and even animation in a single format. In lossy mode WebP files are typically 25–35% smaller than a JPG of comparable visual quality, which directly improves page-load speed and Core Web Vitals.
Converting from HEIC to WebP makes sense when you need website images of every kind — product photos, hero images, thumbnails — where smaller files mean faster pages. WebP is supported by all modern browsers (Chrome, Firefox, Safari 14+, Edge).
Both formats support transparency, and this converter preserves the alpha channel — transparent areas in your HEIC stay transparent in the WebP.
How to convert HEIC to WebP
Drag and drop one or more HEIC files into the box above (or click to browse). Adjust the quality slider if you want smaller files or higher fidelity, then press Convert. Each file is decoded and re-encoded as WebP on your own device in a second or two, and you can download results individually or grab everything as a ZIP.
Unlike most online converters, FileLark never uploads your files to a server. The conversion runs entirely inside your browser using modern web technology, which means it works offline once the page has loaded, there are no file size queues or daily upload limits, and your images can never be stored, scanned, or leaked — they simply never leave your device.