How do I convert HEIC to AVIF?

Upload your HEIC 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 HEIC 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.

HEIC or AVIF: which should I use?

Use HEIC for saving storage space on iPhones and iPads. 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.

HEICファイルとは？

HEICはiPhoneやiPadが写真を保存する標準の形式です。同程度の画質ならJPGの最大半分の容量で済みますが、多くのWindowsパソコン、Androidアプリ、Webサイトではまだ開けません。

Is the HEIC 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 HEIC to AVIF — Smallest High-Quality Images

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

Drop your HEIC file or click to browse

Why convert HEIC to AVIF?

AVIF is supported far more widely than HEIC, so the file is easier to open, share and upload.
AVIF is made for the smallest high-quality images for websites and apps.

What to expect when converting HEIC to AVIF

AVIF uses lossy compression by default; raise the quality or switch on lossless in Settings for a closer copy.
ハイダイナミックレンジや広色域のディテールは、標準の8ビットカラーに変換されます。

HEICとAVIFの比較

機能	HEIC	AVIF
氏名	High Efficiency Image Container	AV1 Image File Format
由来	iOS 11（2017年）以降のAppleの標準写真形式	Released by the Alliance for Open Media in 2019
圧縮	非可逆（HEVC）	非可逆または可逆
透過	iPhoneの写真では使われない	Yes — smooth, partial transparency
アニメーション	いいえ	はい
色	チャンネルあたり8または10ビット、広色域	8, 10 or 12 bits per channel, including HDR
開けるアプリ	Apple devices; many Windows PCs, Android apps and websites need extra software	Current Chrome, Edge, Firefox and Safari 16+; fewer editing apps
こんな方に最適	saving storage space on iPhones and iPads	the smallest high-quality images for websites and apps
主な欠点	limited support outside Apple devices	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 HEIC for saving storage space on iPhones and iPads; choose AVIF for the smallest high-quality images for websites and apps.

Frequently asked questions

How do I convert HEIC to AVIF?: Upload your HEIC 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 HEIC 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.
HEIC or AVIF: which should I use?: Use HEIC for saving storage space on iPhones and iPads. 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.
HEICファイルとは？: HEICはiPhoneやiPadが写真を保存する標準の形式です。同程度の画質ならJPGの最大半分の容量で済みますが、多くのWindowsパソコン、Androidアプリ、Webサイトではまだ開けません。
Is the HEIC 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.

HEIC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 HEIC files to AVIF online
Choose AVIF quality or switch to lossless
Switch to any other output format in Settings
Batch-convert many HEIC 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

HEIC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）。