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画像をオンラインで無料リサイズ。ピクセルまたはパーセントでサイズ変更、アスペクト比維持、トリミング対応。JPG、PNG、WebP対応、一括処理可能。
画像 リサイザー is a free online 画像 tool that runs entirely in your browser — your files never leave your device and are never uploaded to any server. No installation, no signup; works on both phone and desktop, ready to use instantly.
画像処理は Canvas API と WebAssembly を通じてローカルで行われ、バッチ処理に対応しています。ダウンロード前に結果を即座にプレビューできます。
We noticed most image compressors upload files to servers. Since privacy is our core principle, we built this tool to process everything locally using Canvas API and WebAssembly.
E-commerce managers and marketers preparing product photos and promotional graphics. Platforms have strict size and format requirements, and this tool lets you meet them quickly — no need to wait for a designer or open Photoshop for a simple resize.
はい、完全無料で登録不要です。
はい、モバイルブラウザでタッチ操作に対応しています。
画像
ツールには品質コントロールが用意されており、ファイルサイズと画質のバランスを調整できます。
ToolPure supports JPG, PNG, WebP, AVIF, GIF, and BMP formats. You can convert between any of these formats and adjust quality from 10% to 100% for optimal file size.
Yes, you can upload and process up to 100 images simultaneously. Batch operations include compression, format conversion, and resizing with a single quality setting applied to all files.
Both options are available. For JPG and WebP, you can choose lossy compression with adjustable quality. For PNG, lossless compression is used. AVIF supports both modes depending on your quality settings.
Yes. 画像 リサイザー runs entirely in your browser: files you select are never uploaded to any server — all processing happens in your device's memory and is wiped when you close the page.
🔒 Privacy & Security：All processing happens locally in your browser. Files are never uploaded or stored.
🔒 Privacy: All processing happens locally in your browser. Your files and data never leave your device — no upload, no server, no tracking.
画像 リサイザー is a free alternative to the following paid tools — see the full comparison: