PDF圧縮
共有しやすいようにファイルを小さくします。
ここにファイルをドロップ
または
対応形式: PDF
圧縮はページを描き直すため、選択できる文字は画像になります。印刷する文書には最高品質を選んでください。
無料 · 登録不要 · ほとんどのツールでファイルは端末から出ません
このツールは完全にブラウザ内で動作します。ファイルがアップロードされることはありません。
使い方
1
アップロード
2
設定
3
ダウンロード
よくある質問
Is PDF圧縮 free?
Yes. PDF圧縮 is completely free with no sign-up, no watermark and no daily limit. There is no paid tier — every tool on iAdorePDF is free to use as often as you like.
Is PDF圧縮 safe and private?
Yes. PDF圧縮 runs entirely inside your browser, so your file is never uploaded to any server. Nothing leaves your device, which makes it safe for confidential documents.
Do I need to install any software?
No. PDF圧縮 works in any modern browser — Chrome, Safari, Firefox or Edge. There is nothing to download and no account to create.
Does PDF圧縮 work on a phone?
Yes. PDF圧縮 is built mobile-first and works on iPhone and Android exactly as it does on a computer, straight from the browser.
How much smaller will my PDF be?
Scanned and image-heavy PDFs usually shrink by 50-80%. Pick Smallest size for email attachments, or Best quality when the document will be printed. Compression re-renders pages, so selectable text becomes an image.
How do I use PDF圧縮?
Open the page, drop your file into the upload box (or tap Select file), choose your options, then press the start button. Your result downloads straight to your device.
Is there a file size limit?
There is no server limit because the work happens on your own device. The practical ceiling is your device memory; files up to about 100 MB are comfortable on most phones and much larger on a computer.