画像ツール
オンライン画像変換
JPG、PNG、WebP、AVIF、HEICをブラウザで変換し、複数ファイルをZIPで保存します。
Conversion settings
Choose one or more JPG, PNG, WebP, AVIF or HEIC images to begin.
ほとんどのツールはブラウザ内でローカル処理します。背景除去では選択した画像を設定済みサーバーで処理し、完了後に元画像を削除します。
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使い方
- Drop images into the tool or choose them from your device.
- Select an output format and adjust quality or the JPG background color.
- Convert all images, review file sizes, then download individual files or a ZIP.
おすすめの用途
- Website assets
- Photo sharing
- Preparing image batches
注意点
JPG, PNG and WebP conversion is supported by standard browser Canvas APIs. AVIF and HEIC depend on browser codec support; files are never uploaded and unsupported codecs are reported clearly.
よくある質問
Are my images uploaded?
No. Images are decoded and encoded in your browser. Files, names, pixels and EXIF data never leave your device.
Can I convert multiple images at once?
Yes. Drop or select several images and use Convert All. Each file is handled independently.
Which image format should I choose?
JPG is broadly compatible, PNG keeps lossless detail and transparency, WebP is a practical smaller web format, and AVIF can be smaller when supported.
Does JPG support transparency?
No. Transparent pixels are composited onto the selected background, which defaults to white.
Can I convert HEIC photos to JPG?
Only when your browser can decode HEIC locally. Browsers without a HEIC codec show an unsupported message instead of uploading the file.
Why is the converted file larger?
Different codecs and quality settings can produce different sizes. The tool reports increases accurately.
Can I download all files as a ZIP?
Yes. The ZIP is generated locally and includes only successful conversions.