画像圧縮ツール
アップロードせずにブラウザで画像を圧縮します。すべての処理はデバイス上でローカルに行われます。
80%
Drop images here or click to upload
PNG, JPG, WebP supported
Tips
- • WebP format typically provides the best compression
- • Quality 80% is usually a good balance of size and quality
- • Images are processed entirely in your browser - nothing is uploaded
- • For best results, don't compress already compressed images
Image Compression - 技術的な詳細
Image compression reduces file size by removing unnecessary data and using efficient encoding. Lossy compression (JPEG, WebP) achieves smaller sizes but loses some quality. Lossless (PNG) preserves quality but with larger files.
コマンドラインでの代替方法
# Compress with ImageMagick\nconvert input.jpg -quality 80 output.jpg\n\n# Compress with ffmpeg\nffmpeg -i input.png -compression_level 100 output.png\n\n# WebP conversion\ncwebp -q 80 input.png -o output.webp