How do I convert JPG to AVIF?

Upload your JPG file above. It is converted to AVIF automatically (change the output format or quality in the Settings tab if you need to), then click Download. There is nothing to install.

Does converting JPG to AVIF lose quality?

AVIF is lossy by default, so some fine detail is discarded to make the file smaller. Raise the quality or switch on lossless in Settings for a closer copy.

JPG or AVIF: which should I use?

Use JPG for photos you share, email, print or upload. Use AVIF for the smallest high-quality images for websites and apps. Keep in mind the main drawback of AVIF: it is slow to create and many editing apps and older devices can't open it.

JPGファイルとは？

JPG is the standard format for photos. It shrinks files by discarding detail the eye barely notices, which suits photographs but blurs text and sharp edges.

Is the JPG to AVIF converter free?

Yes. Convert, preview and download a single result without creating an account. Premium adds batch conversion (many files into one ZIP) and larger uploads.

Convert JPG to AVIF — Smallest High-Quality Images

Convert JPG to AVIF online for very small, high-quality web images. No software to install. Preview one free or batch-convert with Premium.

Drop your JPG file or click to browse

Why convert JPG to AVIF?

AVIF files are usually smaller than JPG for the same picture, so pages load faster and uploads finish sooner.
AVIF is made for the smallest high-quality images for websites and apps.

What to expect when converting JPG to AVIF

AVIF uses lossy compression by default; raise the quality or switch on lossless in Settings for a closer copy.
元のJPGファイルは変更されません。新しいAVIFのコピーをダウンロードします。

JPGとAVIFの比較

機能	JPG	AVIF
氏名	JPEG (Joint Photographic Experts Group)	AV1 Image File Format
由来	1992年に標準化	Released by the Alliance for Open Media in 2019
圧縮	非可逆、画質を調整可能	非可逆または可逆
透過	いいえ	Yes — smooth, partial transparency
アニメーション	いいえ	はい
色	1,670万色（チャンネルあたり8ビット）	8, 10 or 12 bits per channel, including HDR
開けるアプリ	All browsers, phones, computers and photo apps	Current Chrome, Edge, Firefox and Safari 16+; fewer editing apps
こんな方に最適	photos you share, email, print or upload	the smallest high-quality images for websites and apps
主な欠点	no transparency, and every re-save loses a little more detail	作成に時間がかかり、多くの編集アプリや古いデバイスでは開けない

In short: choose JPG for photos you share, email, print or upload; choose AVIF for the smallest high-quality images for websites and apps.

Frequently asked questions

How do I convert JPG to AVIF?: Upload your JPG file above. It is converted to AVIF automatically (change the output format or quality in the Settings tab if you need to), then click Download. There is nothing to install.
Does converting JPG to AVIF lose quality?: AVIF is lossy by default, so some fine detail is discarded to make the file smaller. Raise the quality or switch on lossless in Settings for a closer copy.
JPG or AVIF: which should I use?: Use JPG for photos you share, email, print or upload. Use AVIF for the smallest high-quality images for websites and apps. Keep in mind the main drawback of AVIF: it is slow to create and many editing apps and older devices can't open it.
JPGファイルとは？: JPG is the standard format for photos. It shrinks files by discarding detail the eye barely notices, which suits photographs but blurs text and sharp edges.
Is the JPG to AVIF converter free?: Yes. Convert, preview and download a single result without creating an account. Premium adds batch conversion (many files into one ZIP) and larger uploads.

JPGからAVIFへでできること

始める前に、主な機能を確認してください。

Convert JPG files to AVIF online
Choose AVIF quality or switch to lossless
Switch to any other output format in Settings
Batch-convert many JPG files into one ZIP
Preview the result before you download

このツールを使用する

設定リファレンス

JPGからAVIFへで使用可能なコントロール。

設定

出力形式ドロップダウン: Chooses the file type you download. The page opens on its own output format; switch to any other format before converting.オプション: JPGPNGWebPAVIFGIFTIFFBMPICOPDF
品質スライダーレンジ: 20–100 · デフォルト: 90: For JPG, WebP, AVIF and image-to-PDF output: higher keeps more detail but makes a bigger file; 60–80 suits most photos. Documents (Publisher, XPS, EPS…) become PDFs with every page and sharp text, with no quality setting.
ロスレスモードオン/オフ: For WebP and AVIF output: keeps every pixel exactly (best for logos, graphics and transparency) at the cost of a larger file.
背景の塗りつぶしカラーピッカー: 透過を保存できないJPG、BMP、画像からPDFへの出力用：透明な部分を塗りつぶす色（既定は白）。