WebP → AVIF
Convert WebP to AVIF – locally in your browser
Why WebP → AVIF?
AVIF typically offers 20% smaller files than WebP at the same quality. For web projects already using WebP, AVIF is the next optimization step – royalty-free with growing support.
Frequently Asked Questions
What is an AVIF file?
AVIF (AV1 Image File Format) is the latest image format based on AV1. It compresses even better than WebP and is royalty-free.
Are my images safe?
Yes, 100%. The conversion happens completely locally in your browser – your images are never uploaded to a server.
Can I convert multiple files at once?
Yes, you can upload and convert as many WebP files as you want at the same time.
Is the conversion free?
Yes, wandlio.de is completely free. No registration, no limits, no ads.
About AVIF
AVIF (AV1 Image File Format) is based on the AV1 video codec from the Alliance for Open Media and was standardized in 2019. It offers the best compression of any current image format - typically 50 percent smaller than JPEG at the same quality - and supports HDR with PQ and HLG transfer functions, transparency, and animation. AVIF uses intra coding from the AV1 codec with block partitioning and filters optimized for still images. The format is supported by Chrome, Firefox, and Edge; Safari since version 16 (2022). AVIF is considered the most promising candidate for the next standard web image format. The disadvantage is the still longer encoding time compared to JPEG and WebP, which matters for large volumes of images. AVIF is patent-free and royalty-free, making it free from patent restrictions unlike HEIC/HEIF. AVIF with 10-bit color depth enables extended color gamut and higher dynamic range for professional photography.
About WebP
WebP was developed by Google in 2010 and is the only mainstream image format that offers both lossy and lossless compression in a single container. The lossy variant uses VP8 intra coding and typically achieves 25–35% smaller files than JPEG at the same subjective quality. The lossless variant is based on prediction and LZ77 compression and is about 26% smaller than PNG at identical pixel fidelity. WebP supports transparency with an alpha channel, animations, EXIF and XMP metadata, and color depths of up to 8 bits per channel. Safari did not support WebP until version 14 (2020), which slowed adoption for years; since 2021, however, the format is supported by all modern browsers. For web developers, WebP is the best choice when loading time and bandwidth are priorities, since a single image type covers both compression strategies. Google has recommended WebP as the standard web image format since 2019 and offers WebP 2 as an experimental further development, though it has not yet entered any standardization process.
Why convert WEBP → AVIF?
WebP is Google's modern image format combining lossy and lossless compression, transparency, and animation in one format. Despite broad browser support (97%+ market penetration), compatibility gaps remain: older image editors like legacy Photoshop versions, certain CMS systems, Microsoft Office before 2021, and some email clients can't render WebP. Converting to AVIF ensures maximum compatibility across all systems. This is especially important when embedding images in documents, emailing recipients with older software, or using systems that don't yet support WebP. For WebP animations, AVIF provides the classic alternative.