ImageTool Pro
Free Image Compressor

Compress Image to 1MB

1MB ピクセル

Reduce your image file size to under 1MB while maintaining visual 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。

2 MB
Target: 2 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
すべての圧縮オプションを表示 →

このツールについて

Need to compress your images to under 1MB? Our free online tool helps you reduce image file sizes while maintaining quality.

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

Set target size to 1MB.

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

1MB に圧縮すると画質は低下しますか？
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.
1MB に圧縮するとどうなりますか？
Compressing to a target size means adjusting the image quality and encoding parameters so the final output file does not exceed the target. Our tool uses a binary search algorithm to automatically find the highest quality setting that meets this limit.
複数の画像を一括で 1MB に圧縮できますか？
Yes! Upload multiple images and compress them all to under 1MB with consistent settings in one batch.
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.

Compress Your Image Now

Free, fast, and private image compression.

画像をアップロード

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