Convert HEIF to AVIF

HEIF (High Efficiency Image Format) is a modern image file format that offers superior compression compared to JPEG while maintaining higher image quality. Developed by MPEG, it can store both still images and image sequences. HEIF files typically use the .heif extension and are particularly popular on Apple devices running iOS 11 or later. The format supports features like transparency, 16-bit color, and HDR imaging.

AVIF (AV1 Image File Format) is a modern image format that offers superior compression and quality compared to JPEG, PNG, and WebP. Developed by the Alliance for Open Media, AVIF supports both lossy and lossless compression, HDR, wide color gamut, and transparency. Its efficient encoding reduces file sizes while maintaining excellent image quality, making it ideal for web content and digital media storage.

AVIF output is useful when you want small files, for example on a website, and the people or software receiving them support AVIF. It can be smaller than JPG at similar visual quality, but results vary by image and quality setting. Support is less universal than JPG, so check compatibility before sending AVIF files.

.AVIF image format fully supports transparency through an alpha channel, similar to PNG files. The format handles both binary (fully transparent or opaque) and variable transparency levels (partial opacity). When compressing images with transparency, AVIF maintains high quality while achieving better compression ratios compared to PNG and WebP formats. This makes AVIF an excellent choice for web graphics requiring transparency, such as logos, icons, and overlays.

Some quality loss is possible. Framebird decodes your HEIF image and encodes a new AVIF file, and AVIF output from this tool can lose fine detail. The default quality setting is 90, which suits most everyday uses. Even quality 100 does not guarantee an identical image. Metadata from the source is not copied, so keep your original HEIF file as a backup.