Image Compressor
Compress JPEG, PNG, and WebP images online for free. Reduce file size without losing quality — all processing happens in your browser.
Drop images here or click to upload
JPEG, PNG, WebP, GIF, BMP · Multiple files supported
All processing happens locally — your images never leave your device.
このツールについて
Compress and optimize JPEG, PNG, and WebP images directly in your browser. Adjust quality, choose output format, and see live before/after file size comparison. Batch compress multiple images at once. Your files never leave your device.
使い方
Upload Images
Drop one or more JPEG, PNG, or WebP images onto the page.
Adjust Settings
Set quality level and choose output format.
Download
Download individual compressed images or all as a ZIP.
活用シーン
Web Performance
Reduce image payload before uploading to websites, blogs, or e-commerce stores.
よくある質問
Is my image uploaded to a server?
No. All compression happens locally in your browser using the Canvas API. Your images never leave your device.
What formats are supported?
Input: JPEG, PNG, WebP, GIF, BMP. Output: JPEG, PNG, or WebP.