ImageTool Pro
Free Image Compressor

Compress Image

Reduce image file size while maintaining the best possible quality.

Quality-based or target-size compression Adjustable compression level Batch compress multiple images No upload - 100% browser-based

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すべての圧縮オプション

画像を圧縮する目標ファイルサイズを選択、またはエディタでカスタムサイズを設定。

すべての形式 JPEGPNGGIFWEBPHEICJPG
2 MB
Target: 2 MB
1 MB
Target: 1 MB
200 KB
Target: 200 KB
100 KB
Target: 100 KB
50 KB
Target: 50 KB
20 KB
Target: 20 KB
10 KB
Target: 10 KB

このツールについて

Compress your images to reduce file size with our free online tool. Choose quality-based or target-size compression.

機能

スマート圧縮

Automatically optimize quality settings to meet your target file size.

複数形式対応

Compress JPEG, PNG, and WebP images with format-specific optimizations.

一括処理

Compress multiple images at once with consistent settings.

プレビュー表示

Compare original and compressed images before downloading.

使い方

01

画像をアップロード

Drag and drop or click to select the image(s) you want to process.

02

目標を設定

Choose quality level or set a target file size.

03

設定を調整

Configure resampling method, aspect ratio, and output format.

04

ダウンロード

Click the download button to save your processed image.

よくある質問

Will compression reduce image quality?
Lossy compression (like JPEG) discards some image data, but at high quality settings the visual difference is usually imperceptible. Our tool helps you find the optimal balance between file size and quality.
How much can I compress an image?
Compression depends on the original image. JPEG images can typically be reduced 50-80% with minimal quality loss.
この圧縮ツールは無料ですか？
Yes, this compression tool is completely free with no signup required, no watermarks, and no usage limits.
データは安全ですか？
Absolutely safe! All image processing happens in your browser. Your images are never uploaded to any server.
複数の画像を一括で target size に圧縮できますか？
Yes! Upload multiple images and compress them all to under target size with consistent settings in one batch.

Compress Your Image Now

Free, fast, and private image compression.

画像をアップロード

このツールを共有

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