🗜️ PDF 圧縮
PDFファイルサイズを縮小 — 無料、高速、プライベート。
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使い方 PDF 圧縮
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ボタンをクリックして、ブラウザ内で即座にファイルを処理します。
処理されたファイルは自動的にダウンロードされます。登録不要！
Performance & Details
Typical compression: 30-80% file size reduction depending on image density. A 10 MB scan-heavy PDF often compresses to 2-4 MB. Preserves text quality and readability.
All processing uses pdf-lib (open-source). Files stay in your browser — zero server uploads. Last verified: May 2026.
PDF 圧縮 — 全米で利用可能
PDF 圧縮 — Available Across Europe
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Go Pro — $5/monthPDF 圧縮 — Frequently Asked Questions
How much can I reduce my PDF size?▼
Typically 30–80% reduction, depending on how many images are in the PDF. Text-only PDFs compress less.
Will compression make my PDF blurry?▼
We use smart compression that reduces file size while keeping text crisp and images acceptably clear.
Can I compress a PDF for email attachments?▼
Yes — most email clients have a 10MB or 25MB limit. Compressing your PDF first ensures reliable delivery.
Does compression remove any content?▼
No pages, text, or images are removed. Only internal data overhead is reduced.
Can I compress the same PDF multiple times?▼
You can, but the gains diminish after the first compression. Run it once for the best result.