Convert AVIF to WebP Online
Convert AVIF images to WebP free, in your browser, no file uploads.
.webp, .png, .jpg · up to 50 MB
Use cases
AVIF to WebP: maximum compatibility without losing speed
Works in all CMSs
WebP works in WordPress, Shopify, Squarespace, and any modern CMS with no extra configuration.
Social media and OG images
Link previews on Twitter, Facebook, and LinkedIn display WebP correctly.
Safari since 2020
WebP works in Safari 14+ (Sept 2020). AVIF only from Safari 16+ (Sept 2022).
100% private
Conversion uses the Canvas API in your browser. Your image never leaves your device.
How it works
Three steps, no hassle
Upload your AVIF image
Drag or select your .avif file. Up to 50 MB, no signup.
Browser-side conversion
Your image converts to WebP using the Canvas API. Never sent to any server.
Download your WebP
Image ready to upload to WordPress, social media, or any WebP-compatible CMS.
FAQ
Got questions?
AVIF (AV1 Image File Format) was created by the Alliance for Open Media and published as a standard in 2019. It offers the best compression currently available, outperforming WebP and JPEG by 20–50% at the same visual quality. However, its adoption in tools and platforms is still incomplete: WordPress did not natively generate AVIF thumbnails until version 6.5 (2024), many popular CMSs do not accept AVIF uploads, and email clients (Gmail, Outlook) will not render AVIF. WebP, developed by Google in 2010, has far broader support and is the ideal intermediate format when you need compatibility without sacrificing too much compression.
Browser support is the key compatibility difference. WebP was introduced in Chrome 9 (2011) and has over a decade of support. Safari added WebP in version 14.0 (September 2020) for iOS 14 and macOS Big Sur. AVIF arrived in Chrome 85 (August 2020) and Firefox 93 (October 2021), but Safari only added AVIF support in version 16.0 (September 2022). Any Safari user below 16.0 cannot display AVIF images, while WebP has two additional years of support in the Apple ecosystem.
Yes, some quality loss occurs because both formats use lossy compression and the underlying codec changes (AV1 → VP8/VP9). Conversion requires decompressing the AVIF to raw pixels, then re-encoding with the WebP encoder. At 90% quality the results are excellent and virtually indistinguishable to the human eye. What you do lose is AVIF's compression advantage: the resulting WebP file will typically be 15–30% larger than the original AVIF at the same visual quality level.
Open Graph images (og:image) appear in link previews on Twitter/X, Facebook, LinkedIn, and WhatsApp. The scrapers these platforms use to generate previews do not always support AVIF. Facebook and Twitter have documented preferences for JPG or PNG for og:image, but WebP works in practice on most modern platforms. If your OG images are in AVIF and not displaying correctly in social previews, converting to WebP typically resolves the issue.
WordPress added experimental AVIF support in version 6.1 (November 2022) and improved it in 6.5 (April 2024), but AVIF thumbnail generation requires the server to have libavif installed and enabled in PHP-GD or Imagick — not available on most shared hosting plans. WebP, by contrast, has had stable WordPress support since version 5.8 (July 2021) and works on virtually any modern hosting environment.
For SEO, the priority is fast image loading (Core Web Vitals, especially LCP). AVIF offers better compression than WebP, meaning smaller files and better LCP when the browser supports it. The optimal strategy is to serve AVIF with a WebP fallback using the HTML picture element: the browser automatically picks the best format it supports. If your CMS doesn't allow this setup, WebP is the safe choice that guarantees speed across all modern browsers.
Convert AVIF to WebP: compatibility, CMS, and social media
AVIF (AV1 Image File Format) is the most advanced image format available for the web today. It was specified by the Alliance for Open Media (AOMedia), the consortium founded in 2015 by Google, Mozilla, Microsoft, Apple, Amazon, Netflix, Intel, AMD, ARM, and other major technology players, with the goal of developing open, royalty-free multimedia formats. AVIF was officially published as a standard in 2019 and is based on still frames of the AV1 video codec — the same codec used by YouTube, Netflix, and other high-quality streaming services for their highest-tier encoding. AV1 delivers over 50% better compression efficiency than JPEG and 20–30% better than WebP at the same visual quality level, measured with objective perceptual metrics like SSIM (Structural Similarity Index) and DSSIM (Dissimilarity SSIM). AVIF also supports images with up to 12-bit color depth per channel (compared to 8-bit for standard JPEG and WebP standard profiles), Wide Color Gamut (WCG) covering the Rec. 2020 color space, and High Dynamic Range (HDR) with PQ and HLG transfer functions, making it suitable for professional photography, digital cinema, and high-fidelity display content on modern screens. Despite these objectively measurable technical advantages, AVIF has a real and quantifiable adoption gap in the web tooling ecosystem: its support in content management systems, email clients, social media scrapers, on-the-fly image transformation CDNs, server-side image processing libraries, and image optimization services is significantly lower than WebP, which has had over a decade of broad and stable adoption across the entire web infrastructure stack. Converting AVIF to WebP is not a technological step backward; it is a pragmatic, well-founded compatibility decision when the file's final destination cannot guarantee complete and reliable AVIF support across all consumers of the image.
The compatibility gap between AVIF and WebP is most visible and quantifiable in the Apple device ecosystem, which represents between 25 and 30% of global web traffic according to StatCounter data. Safari added WebP support in version 14.0, released on September 16, 2020, alongside iOS 14 and macOS Big Sur — the last major desktop browser to adopt it, more than nine years after Google introduced WebP in Chrome 9 (2011). AVIF arrived in Safari version 16.0, released September 12, 2022, with iOS 16 and macOS Ventura — exactly two years after WebP support landed in the Apple ecosystem. This means any iPhone or iPad user on iOS 15 or earlier cannot render AVIF images in the browser, and the percentage of users on iOS 15 or earlier remains statistically relevant according to Apple's iOS version distribution data (available at developer.apple.com/support/app-store/). On Android and Windows the picture is better but still imperfect: Chrome supported AVIF from version 85 (August 2020), Firefox from version 93 (October 2021), and Edge from version 90 (April 2021). However, older Android devices running Chrome below version 85 or system WebView components that have not been updated may still lack AVIF support. Email clients represent the most extreme incompatibility case: neither Gmail on any platform, nor Outlook in any version (web, Windows, or Mac), nor Apple Mail on versions prior to macOS Ventura (October 2022) render AVIF images embedded in HTML message bodies. Images in these email clients either fail to render or display a broken image placeholder, making AVIF completely unsuitable for email use cases. For email marketing campaigns, transactional emails, and newsletters, WebP or JPG are the only formats with sufficiently broad compatibility to be dependable across the full range of recipient email clients.
In the content management platform ecosystem, the AVIF versus WebP situation mirrors the same pattern of delayed adoption across the industry. WordPress, the platform powering approximately 43% of all websites worldwide according to W3Techs (verifiable at w3techs.com/technologies/details/cm-wordpress), added experimental AVIF upload support in version 6.1 (November 2022), but automatic AVIF thumbnail generation in multiple sizes — the process WordPress performs at upload time to create all the optimized image versions registered by the theme and active plugins — requires the server to have the libavif library compiled and integrated with PHP-GD or Imagick. This library is not installed by default on the vast majority of shared hosting plans from providers like SiteGround, Bluehost, HostGator, DreamHost, or GoDaddy. Without libavif, WordPress silently falls back to generating WebP or JPEG thumbnails even when the uploaded file is AVIF. WebP, by contrast, has had stable, dependency-free support in WordPress since version 5.8 (July 2021), using the libwebp library available on virtually any modern GD or Imagick installation. Shopify, Squarespace, Wix, Webflow, and most SaaS e-commerce and website-building platforms offer native WebP support in their image-processing pipelines but limited, partial, or no AVIF support as of the same date. Cloudinary, imgix, and Fastly Image Optimizer — the major image CDN and transformation services used in production — all support serving WebP automatically, while AVIF support is available on a per-plan or opt-in basis. For Open Graph images — the thumbnails that appear in link previews when sharing on Twitter/X, Facebook, LinkedIn, and WhatsApp — WebP is the safer choice, because the social media scrapers (facebookexternalhit, Twitterbot, LinkedInBot) have inconsistent and incomplete AVIF support, which can result in broken or blank link previews if the source image is AVIF.