Convert HEIC to JPG
iPhone photos into standard JPEGs — where your browser can decode HEIC natively.
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対応形式: HEIC, HEIF
ローカルで処理します。画像が端末の外に出ることはありません。
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iPhones save photos as HEIC by default. It is an efficient format, and it is also the reason a photo airdropped to a Windows machine or attached to an email so often will not open.
Converting HEIC in a browser is genuinely hard: unlike JPEG, PNG and WebP, HEIC decoding is not built into most browsers. Safari on Apple platforms can do it; Chrome, Firefox and Edge generally cannot. Rather than shipping a large WebAssembly decoder or quietly uploading your photo to a server, KaiConvert checks whether your browser can decode HEIC and tells you the answer.
できること
Local when your browser allows it
On a browser with native HEIC support the conversion runs on your device like every other tool here.
No silent uploads
If local decoding is impossible, nothing is sent anywhere. You are told the tool cannot run, not handed a fake result.
Standard JPEG output
The converted file opens on Windows, Android, in email clients and in every photo application.
Quality control
The JPEG quality slider is yours, not a fixed default.
使い方
- 1
Capability check
KaiConvert asks the browser whether it can decode image/heic before anything else happens.
- 2
Decode and re-encode
If supported, the photo is decoded to pixels and written out as JPEG at your chosen quality.
- 3
Download
A standard .jpg file, ready to share anywhere.
仕様
- This tool is beta. It depends on a native browser HEIC decoder, which most browsers do not ship. KaiConvert detects support up front and refuses to run rather than uploading your photo or fabricating a result.
KaiConvert を選ぶ理由
- ローカルツールはアップロード不要
- ページ読み込み後はオフラインでも動作
- クラウド AI は開始前に必ず明示