JXL to AVIF Converter

About JXL

JPEG XL (JXL) is a next-generation image format standardised by ISO/IEC in 2022, developed as a long-term replacement for JPEG. It achieves up to 60% smaller file sizes than JPEG at equivalent visual quality and typically 20–35% smaller than AVIF or WEBP in photographic content. It supports both lossy and lossless compression, 32-bit HDR, wide colour gamuts (P3, Rec. 2020), alpha transparency, and animation.

Browser adoption is growing rapidly: Safari 17+ (2023), Chrome 91+ (lossless/transparent sequences), and Firefox 128+ support JXL natively. Google Photos uses JXL for archival storage, and Apple adopted it as the preferred export format in several iCloud contexts.

When to convert to JXL: When targeting modern browsers and archival quality with minimum file size. Professional photographers and developers storing large image libraries benefit significantly from JXL's superior compression. For delivery to the broadest possible audience today, WEBP or AVIF retain wider compatibility.

When to convert from JXL: When you need to use a JXL image in software, a website, or a service that does not yet support JXL — converting to JPG or PNG gives universal compatibility with no quality loss for lossless JXL sources.

About AVIF

AVIF (AV1 Image File Format) is the most compression-efficient image format widely available today. Developed by the Alliance for Open Media (AOM) — a consortium that includes Google, Mozilla, Apple, Netflix, and others — and released in 2019, AVIF uses the AV1 video codec to achieve image file sizes 40–60% smaller than equivalent JPGs, and typically 20–30% smaller than WEBP, at the same visual quality. It supports 10-bit color depth, HDR (high dynamic range), wide color gamuts (P3, Rec. 2020), and transparency.

Browser support has grown rapidly: Chrome added AVIF support in version 85 (2020), Firefox in version 93 (2021), and Safari in version 16 (October 2022). Edge supports AVIF. Google Search already uses AVIF for image thumbnails, and Google Photos converts uploads to AVIF internally. For websites, smaller image files mean faster page loads, better Core Web Vitals scores (Largest Contentful Paint in particular), and reduced bandwidth costs for both the server and the visitor.

When to use AVIF: For any web-published image where load speed matters — hero images, product photos, blog thumbnails, portfolio images. The smaller file sizes have a measurable impact on page speed scores and, by extension, SEO ranking signals. If your target audience is on modern browsers (Chrome, Firefox, Safari 16+), AVIF is the strongest compression choice available without sacrificing quality.

When to stay with JPG or PNG: When maximum compatibility is required — enterprise environments running Internet Explorer, older Android WebView apps, desktop image-editing software that has not yet added AVIF support, or email clients. For these use cases, JPG remains the safer universal choice.