JPG to AVIF Converter

Why convert JPG to AVIF?

AVIF (AV1 Image File Format) is the next-generation image format developed from the open-source AV1 video codec. At the same perceptual quality, AVIF files are typically 40–50% smaller than JPG and 20–30% smaller than WebP. For websites with many images — product photos, blog post images, portfolio galleries — switching from JPG to AVIF can meaningfully reduce page weight and improve Core Web Vitals scores.

JPG vs AVIF vs WebP: compression comparison

How to convert JPG to AVIF

1. Drop your JPG / JPEG files — drag onto the upload zone, click to browse, or paste from clipboard. Up to 30 files at once.
2. Adjust quality — 80% is the recommended starting point: excellent visual quality at roughly half the JPG file size. Go lower for maximum compression, higher if you are archiving originals.
3. Download — individual files or all as a ZIP.

Using AVIF on your website

The safest way to serve AVIF with a fallback for older browsers is the HTML <picture> element:

<picture>
  <source srcset="photo.avif" type="image/avif">
  <source srcset="photo.webp" type="image/webp">
  <img src="photo.jpg" alt="Description">
</picture>

The browser picks the first format it supports. Modern browsers get AVIF; older ones fall back to WebP or JPG without any broken images.

When to use AVIF on your website

AVIF makes the most sense for image-heavy pages where load time is a priority: product galleries, blog posts with multiple embedded photos, portfolio sites, and landing pages with large hero images. The 40–50% file size reduction over JPG translates directly into faster Largest Contentful Paint (LCP) times and better Core Web Vitals scores. Start with your largest, most-viewed images — typically hero images and above-the-fold product photos — where the bandwidth saving is most impactful.

AVIF encoding speed trade-offs

AVIF encoding is significantly slower than JPG or WEBP because of the AV1 codec's complexity. This browser-based converter uses the browser's native AVIF encoder, which prioritizes decode speed over maximum compression — it is fast but produces files 10–20% larger than a dedicated encoder like avifenc (libavif). For one-off conversions and sharing, the browser encoder is convenient. For production web assets where you need the smallest possible files, use a build-time tool like libavif, Squoosh CLI, or a CDN that handles AVIF encoding server-side.

AVIF in Next.js, WordPress, and other platforms

Next.js: the next/image component auto-generates AVIF (and WEBP) variants at request time when a Next.js server is running. No manual conversion needed. WordPress 6.5+: AVIF uploads are supported natively in the Media Library. The ShortPixel and Imagify plugins also convert existing JPGs to AVIF automatically. Astro, Nuxt, SvelteKit: all have built-in image optimization components that serve AVIF to supporting browsers with JPG fallbacks. For static sites without server-side image processing, pre-convert with this tool and serve .avif files directly.

AVIF, WEBP, or JPG: choosing the right format

Use AVIF when browser support is sufficient for your audience (90%+ globally) and you want the smallest file size. Use WEBP when you need slightly broader compatibility (97%) with a smaller size advantage over JPG. Use JPG when compatibility is the top priority — uploading to social platforms, sending via email, or delivering to users on older devices. For modern websites serving international audiences, the recommended pattern is AVIF → WEBP → JPG in a <picture> element, letting each browser pick the best format it supports.

Privacy

All processing runs in your browser using the Canvas API and the browser's built-in AVIF encoder. Your JPG files are never sent to any server — we cannot see them, and nothing is stored after you close the tab.

Frequently asked questions