画像ツール 100% ブラウザ内プライバシー

無料オンライン画像圧縮

鮮明さを維持しながら画像ファイルを軽量化。複数の画像もブラウザ内で一括圧縮可能です。

ファイルをドラッグ＆ドロップ、または選択

JPG, PNG, WebP（最大50MB）対応 • または Ctrl+V でクリップボードから貼り付け

使い方

Three simple steps to process your files

Drag and drop single or multiple JPG, PNG, or WebP images into the compressor dropzone.

Slide the quality controller to find your preferred balance between visual quality and byte savings.

Inspect your exact percentage savings and download individual images or grab all files packaged in a single ZIP archive.

主な機能

Drastically reduce image weights for faster website loading speeds and seamless email attachments.

See exact original vs compressed byte sizes and calculated percentage reduction for every image.

Compress dozens of images simultaneously and download them packaged together in a single click.

Fine-tune quality from 5% to 95% depending on whether file weight or photographic perfection is your priority.

Uses native browser graphics pipelines for lightning-fast batch processing.

Completely free with unlimited compressions and zero daily usage restrictions.

FAQ

How much can I reduce my image size?

Typically, photos can be reduced by 50% to 80% with virtually imperceptible difference in visual quality on web and mobile displays.

Does compressing images delete the original file?

No. The original file on your computer remains untouched. The browser creates a newly optimized copy for download.

Can I compress multiple images at once?

Yes! You can add multiple images at the same time and download them individually or as a single ZIP archive.

Is my data secure and confidential?

Absolutely. We do not operate an image processing backend; every compression computation occurs in your browser memory.

画質を落とさずにピクセル、割合、SNSプリセットでJPG、PNG、WebPの画像サイズを変更。

JPGやPNG画像を、用紙サイズや余白を自由に設定できるPDF文書に変換。

構文エラーの行・列検出とツリー表示を備えた高機能JSON整形・最小化ツール。