Free Online Image Compressor (JPG, PNG, WebP)
Compress JPG, PNG, and WebP images with adjustable quality - private, in-browser
使い方
- 1Drop your images
Drag one or many images into the drop zone - JPG, PNG, or WebP.
- 2Adjust quality and output format
Slide 60–85% for the sweet spot between quality and size. Choose JPG, WebP, or keep PNG.
- 3Download the smaller files
Save each optimized image, or download them all at once.
Free Online Image Compressor (JPG, PNG, WebP) について
Free online image compressor. Shrink JPG, PNG, or WebP files by up to 90% with an adjustable quality slider and instant before/after comparison. Ideal for faster websites, smaller email attachments, and social uploads. Runs entirely in your browser - images are never uploaded. 712 Tools の Free Online Image Compressor (JPG, PNG, WebP) はモダンな JavaScript API を使って完全にブラウザ内で動作します - サーバーがあなたのデータを見ることは一切ありません。つまり、即時の結果、完全なプライバシー、アップロード制限なしです。
デバッグ、簡単な確認、あるいは本番のインシデント対応まで - このツールは何度でも無料で使えます。ウォーターマークなし、サインアップなし、ツール内広告なし。
よくある質問
How much smaller will my images get?
Typical savings: 40–70% for JPG at quality 75; 60–90% converting PNG photos to WebP. Line-art and screenshots compress less.
Is it lossless?
JPG and WebP are lossy at the quality setting you pick. PNG re-encoding is lossless but usually only saves 10–20% - for real gains, convert PNG photos to WebP or JPG.
Are images uploaded?
Never. Compression runs in your browser via the Canvas API. Files stay on your device.
Should I use WebP or JPG?
WebP is 25–35% smaller than JPG at the same visual quality and is supported by every modern browser. Use JPG only when a legacy tool requires it.
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