HEIF is the container format behind HEIC, used by modern phones and cameras. Files end in .heif or .heic, and they save photos in much less space than JPG, but many apps and websites cannot open them. Converting HEIF to WebP gives you small files that still support transparency.
WebP gives small files with good quality and supports transparency, which is why many websites use it for photos and graphics. WebP is lossy at lower quality settings, and a few older apps and programs still cannot open it, so check the destination first. This converter reads HEIF in your browser. Safari handles it directly. Other browsers download a small decoder the first time you add a HEIF file, then convert on your device. Large photos can take a moment.
Choose High for a good balance, Max for the least visible loss, or Low when file size matters most. The pixel dimensions follow the original, each file keeps its name with only the extension swapped, and no metadata or watermark is added. Everything runs in your browser, so your images are never uploaded.
Tip: JPG is the safe choice for sharing, because every device and website opens it. Pick High or Max quality to stay close to the original.
Slightly. WebP is a lossy format, so some fine detail is discarded. At High quality the difference is hard to see in photographs. Text and sharp line art show it more easily.
Photos have no transparency. If a HEIF file has an alpha channel, PNG and WebP keep it, and JPG fills it with white.
They are closely related. HEIC is the common variant that phones produce, and HEIF is the broader format. This tool converts both.
Yes. Add them all, convert once and download a single ZIP. Only the extension changes. A photo named holiday.heif becomes holiday.webp.
No. The conversion happens in your browser and the files never leave your device.