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iPhoneのHEIC写真をJPGに無料変換する方法

Quickly convert Apple iPhone HEIC and HEIF photos to universally compatible JPG or PNG in bulk without uploading files to third-party servers.

ILoveImages Editorial Team

Image Processing & Privacy Specialists

2026年9月26日

Apple iPhones capture photos in high-efficiency HEIC format by default. While this saves valuable storage space on iOS devices, Windows PCs, Android phones, websites, email clients, and office applications frequently refuse to open .heic or .heif files.

Most online converters require uploading your personal family pictures to remote cloud servers, which takes significant upload bandwidth and creates privacy concerns.

ILoveImages includes a built-in WebAssembly HEIC decoder that runs client-side in your browser, converting dozens of iPhone photos into high-resolution JPGs in seconds.

Universal Format Conversion (HEIC/AVIF/WebP) - Proprietary HEIC / AVIF visual comparison (Unsupported Format) before using convert images free — Figure 1: Seamless client-side conversion of proprietary iPhone HEIC and AVIF files into universal high-compatibility JPG/PNG images.
Convert Images Free

Universal Format Conversion (HEIC/AVIF/WebP) - Universal JPG / PNG visual comparison (100% Universal Compatibility) after using convert images free — Figure 1: Seamless client-side conversion of proprietary iPhone HEIC and AVIF files into universal high-compatibility JPG/PNG images.
Convert Images Free

主な機能と特長: Convert Image

従来のデスクトップソフトやクラウドサービスと異なり、ILoveImages Convert ImageはWebAssembly技術を活用してブラウザ内で高速・安全に動作します。主な特長は以下の通りです：

Wide Format Compatibility: Convert seamlessly between Apple HEIC, JPG, PNG, WebP, AVIF, GIF, and SVG.
Native Apple HEIC Decoding: Instantly convert iPhone .heic and .heif photos directly in your browser without Mac software.
High-Fidelity Color Retention: Preserves exact sRGB color profiles and dynamic range during format transformation.
Instant Bulk Conversion: Batch convert hundreds of camera files into web-friendly formats with 1-click ZIP export.

簡単ステップガイド: Convert Image

ソフトウェアのインストール不要、完全なプライバシー保護のもとで、ブラウザ上から数秒で完了する簡単手順です：

ブラウザで ILoveImages Convert Image を開きます。

画像ファイルをブラウザ上にドラッグ＆ドロップするか、ファイルを選択します（すべての処理はブラウザのメモリ内で行われ、外部サーバーへのアップロードは一切ありません）。

Select your target output format (JPG, PNG, WebP, AVIF, or SVG). Adjust the quality slider if converting to a lossy format or enable transparent backdrop retention for PNG/WebP.

Check the live format conversion preview to confirm proper color space rendering and file size optimization.

「ダウンロード」をクリックして処理済み画像をすぐに保存します。複数枚を一括処理した場合は「ZIPでまとめてダウンロード」が可能です。

プロのコツ:Need to process multiple pictures? You can select and upload dozens of photos at once. ILoveImages processes the entire batch simultaneously in parallel using your computer's local hardware acceleration!

Convert iPhone HEIC Photos to JPG Free

No file size limits, no watermark, and zero cloud uploads. Try our instant in-browser converter.

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よくある質問 (FAQ)

Is photo quality lost when converting HEIC to JPG?

Our converter preserves maximum color gamut and visual fidelity, using 92%+ JPEG quality output so your photos look indistinguishable from the original.

Are my private personal photos uploaded anywhere?

Never. The HEIC decoder operates entirely within your browser's local sandbox memory. No image bytes ever touch our servers.

Can I convert live photos and bursts?

Yes, our converter extracts the high-resolution still frame from any Apple Live Photo and converts it into a pristine JPG.

Universal Format Conversion (HEIC/AVIF/WebP)