JPG to AVIF Converter

How to Convert JPG to AVIF Online

1. Upload Your JPG Files: Drag and drop or click "Add Files" to select one or more JPG, JPEG, or JFIF images. Batch conversion is supported — load a whole product-photo folder and process it in a single run.
2. Pick a Quality Preset: The default is "Very High (Recommended)" which targets visually lossless output. Step down to High or Medium for aggressive size cuts on photo-heavy pages, or use the "Specific file size" option to hit a hard byte budget per image.
3. Set Resolution (Optional): Keep original dimensions, scale by Resolution Percentage (1–100%), pick a Preset Resolution from 4320p down to 144p, or enter exact Width / Height (aspect ratio is preserved when only one is set).
4. Convert and Download: Click Convert. Files encode in your browser session and download as individual AVIFs or a zip — no sign-up, no watermark, no upload to a third-party server.

Why Convert JPG to AVIF?

AVIF (AV1 Image File Format) is the AOMedia still-image format derived from the AV1 video codec; the 1.0.0 specification was published in February 2019. At equivalent perceptual quality, AVIF photos typically land 40–60% smaller than JPEG and routinely beat WebP by 10–20%. Unlike JPEG, AVIF supports an alpha channel, 10- and 12-bit color, wide-gamut color spaces (Rec. 2020, P3), HDR, and lossless compression — so a single output format can replace JPEG for photos and PNG for graphics with transparency.

• Web performance and Core Web Vitals — Image bytes dominate most page weight; cutting them in half measurably improves Largest Contentful Paint and reduces CDN egress. Serve AVIF first via <picture> with a JPEG fallback for the small share of legacy browsers.
• E-commerce catalogs — Re-encoding a product library of 50,000 JPEGs averaging 400 KB to AVIF at the same visual quality typically saves 8–10 GB of storage and proportional bandwidth on every page view.
• Photography portfolios — AVIF preserves smooth gradients (skin tones, sky transitions) better than JPEG at small file sizes because AV1's intra-frame prediction handles low-frequency areas more cleanly than JPEG's 8×8 DCT blocks.
• WordPress 6.5+ media libraries — WordPress added native AVIF upload support on April 2, 2024; if your host runs PHP with GD or Imagick built against libavif, the Media Library accepts .avif and generates intermediate sizes automatically.
• Mobile data savings — Smaller payloads mean faster first paint on 4G and lower data charges for users on metered plans, particularly relevant for emerging-market traffic.
• HDR and wide-gamut delivery — Modern phones and laptops capture and display wide-gamut imagery; AVIF carries that color information through the pipeline where JPEG silently clips it to sRGB 8-bit.

JPG vs AVIF — Format Comparison

Quality Preset Quick Guide

Quality controls how aggressively pixel data is encoded; resolution controls pixel dimensions. Reducing both together produces the smallest deliverables — for example, a 4000×3000 JPEG at "Very High" plus a 50% Resolution Percentage often yields an AVIF under 100 KB with no perceptible loss when displayed at typical web widths.

Frequently Asked Questions

How much smaller will my AVIF files actually be?

For typical photographic content the reduction is 40–60% versus the source JPEG at matched perceptual quality. Smooth content (skies, skin, blurred backgrounds) compresses best because AV1's intra prediction excels on low-frequency regions; busy textures (foliage, fabric, fine text screenshots) see smaller gains, sometimes 20–30%. Re-encoding an already-low-quality JPEG yields less savings than starting from a high-quality master.

Will converting JPG to AVIF improve image quality?

No. JPEG is lossy, so detail discarded during the original encode is gone — AVIF cannot reconstruct it. What AVIF does prevent is additional generational loss: at "Very High" preset the AVIF output is visually indistinguishable from the input JPEG even under pixel-peeping, so you keep what you have without paying again for blocking artifacts. Always start from the highest-quality JPEG master available.

Which browsers support AVIF in 2026?

Per caniuse, AVIF is supported in Chrome 85+, Edge 121+, Firefox 93+, Safari 16.4+ (desktop) / 16.0+ (iOS), Opera 71+, and Samsung Internet 14+ — about 94.3% global usage. The ~5–6% gap is mostly older iOS, locked-down enterprise Windows builds, and in-app browsers. The standard pattern is <picture><source type="image/avif" srcset="...avif"><img src="...jpg"></picture> so AVIF-capable clients get the small file and the rest fall through to JPEG.

Can I upload AVIF directly to WordPress?

Yes, since WordPress 6.5 (released April 2, 2024). The Media Library accepts .avif uploads and generates intermediate sizes automatically, provided your hosting environment has an image library compiled with AVIF support — typically libgd ≥ 2.3.3 or Imagick built against libavif. Check Tools → Site Health → Info → Media Handling and look for AVIF in the supported MIME types list. If it's missing, ask your host to enable it or use a plugin that runs conversion server-side.

Why does AVIF take longer to encode than JPEG?

AVIF uses AV1's intra-frame coding, which evaluates many more block partitions, prediction modes, and transform sizes than JPEG's fixed 8×8 DCT. That extra search produces better compression but costs more CPU — on the order of 10–50× slower than libjpeg-turbo for a single image. Decoding is much cheaper, and most 2024+ devices include hardware AV1 decode. For batch jobs the encode cost is a one-time export step; users only pay decode cost on view.

Will AVIF preserve transparency from my source PNGs?

Yes — AVIF supports a full alpha channel up to 12-bit. JPEG does not, so a JPEG → AVIF conversion has no alpha to carry through; you'll get an opaque image. If you need transparency for logos, icons, or product cutouts, start from PNG instead — try PNG to AVIF or convert through AVIF to JPG for the round trip back to a non-transparent format.

Should I use AVIF or WebP?

AVIF compresses better than WebP at the same perceptual quality — typically 10–20% smaller for photos and noticeably better for low-bitrate targets. WebP has slightly broader support (it works in iOS 14+ vs AVIF needing 16.0+) and encodes faster. The pragmatic answer for new content in 2026: serve AVIF first, list WebP next as a fallback for the small remaining gap, and JPEG last as the universal floor — <picture> will pick the first that the browser advertises support for.

Is the conversion private — does my image leave the browser?

Conversion runs entirely in your browser using WebAssembly; image bytes are not uploaded to xconvert's servers. There's no sign-up, no watermark, and no daily limit. Files leave only your machine if you choose to share or upload the resulting AVIF yourself.

What's the difference between AVIF compression and just compressing my JPG further?

JPEG re-compression at lower quality discards more DCT coefficients, which produces visible 8×8 blocking and ringing around edges. AVIF re-encodes from the (already-decoded) JPEG pixels using a fundamentally better algorithm — variable block sizes from 4×4 up to 64×64, more prediction modes, and better entropy coding — so for the same target byte budget AVIF looks substantially cleaner. If size is the goal and modern browsers are acceptable, AVIF wins; if you must keep JPEG, see Compress JPG for an in-format size reduction.