AVIF WebP 変換 - 高速・プライベート
画像を最新形式へ。優れた圧縮率と幅広いブラウザサポートのために、AVIFをWebPに変換しましょう。
AVIFファイルをここにドロップ
またはクリックして選択。最大30ファイルまで。1ファイル10MBまで。
100% クライアントサイド処理で安全AVIFをWebPに変換する方法
AVIFアップロード
.avifファイルを上のボックスにドラッグ&ドロップしてください。
フォーマット選択
JPG、PNG、またはWebPを選択し、品質設定を調整してください。
ダウンロード
変換された画像を個別またはZIPで即座にダウンロードできます。
AvifKitでAVIF WebP変換を選ぶ理由
Optimize your images for maximum web performance.
Client-side Privacy
Your images are converted entirely in your browser. No files are uploaded to any server – perfect for sensitive web assets.
Blazing Fast
Zero upload time. Zero download wait. Our WebAssembly engine handles the conversion instantly with full transparency support.
Web-Optimized Output
WebP offers excellent compression with transparency support. Control quality to find the perfect balance between file size and visual fidelity for your website.
See the Difference: AVIF vs WebP
Both are modern image formats with excellent compression. WebP offers broader browser support while AVIF provides slightly better compression ratios.
Drag the slider to compare image quality
When Do You Need to Convert AVIF to WebP?
Web Performance
WebP is supported by 97%+ of browsers. Use WebP images for fast-loading pages that work everywhere without requiring format fallbacks.
CMS & Platform Support
WordPress, Shopify, Squarespace, and most CMS platforms natively support WebP uploads. Convert your AVIF files for seamless content management.
CDN Optimization
Major CDNs like Cloudflare, Fastly, and AWS CloudFront serve WebP efficiently. Convert your AVIF assets to WebP for optimal CDN delivery.
Browser Compatibility
While AVIF requires Chrome 85+/Safari 16.4+, WebP works in Chrome 32+/Safari 14+. Convert to WebP for broader legacy browser support.
AVIF vs WebP – What's the Difference?
Both are modern formats. Here's how they compare.
| Feature | AVIF | WebP |
|---|---|---|
| Compression | Superior (AV1-based) | Very Good (VP8/VP9) |
| File Size | 10-20% smaller than WebP | Baseline (modern) |
| Transparency | Yes (alpha channel) | Yes (alpha channel) |
| Browser Support | Chrome 85+, Safari 16.4+ | Chrome 32+, Safari 14+ |
| Encoding Speed | Slower | Faster |
| Animation | Yes (AVIF sequence) | Yes (animated WebP) |
| HDR Support | Yes (10-bit, 12-bit) | No (8-bit only) |
| Max Resolution | Codec-dependent | 16383 × 16383 |
Tool Specifications
Frequently Asked Questions
AVIF generally offers 10-20% better compression than WebP, but WebP has much broader browser support (97%+ vs ~93% for AVIF). For maximum compatibility, WebP is the safer choice.
Yes! WebP fully supports the alpha channel. Transparent areas in your AVIF images will be perfectly preserved in the WebP output.
Absolutely. Avifkit uses client-side processing technology. Your images are converted directly within your web browser memory and are never uploaded to any external server.
WebP is supported by Chrome 32+, Firefox 65+, Edge 18+, Safari 14+, and Opera 19+. This covers approximately 97% of global browser usage.
Yes! WebP is the recommended image format for modern websites. It's supported by all major browsers, CDNs, and CMS platforms. Use WebP to reduce page load times and improve Core Web Vitals.
Each file can be up to 10MB. Since processing happens entirely in your browser, larger files may take slightly longer depending on your device's performance.
Yes! Upload up to 30 AVIF files at once. Click Convert All, then download individually or as a ZIP. All conversions run in parallel.
For most web images, 75-85% quality provides excellent results with small file sizes. Use 90%+ for photography where detail matters. Use 60-70% for thumbnails and decorative images.
No. Avifkit is completely free with no registration, no watermarks, and no usage limits. Just open the page and start converting.
Related Conversion Tools
AVIF to JPG
Convert AVIF images to universally compatible JPG format.
AVIF to PNG
Convert AVIF to PNG with full transparency support.
PNG to AVIF
Compress PNG images to smaller AVIF format.
JPG to AVIF
Convert JPG photos to next-gen AVIF format.
WebP to AVIF
Upgrade WebP images to superior AVIF compression.
AVIF to GIF
Convert AVIF images to GIF format.
AVIF to PDF
Embed AVIF images in PDF documents.
AVIF Viewer
Preview AVIF files and inspect metadata.
Avifkit.comは、メディアをある形式から別の形式に簡単かつ迅速に変換できる無料のオンラインファイルコンバーターです。AVIF、WEBP、HEICなどの多くの異なるソース形式と、JPG、PNGなどの出力形式をサポートしています。