Compress PDF — Reduce File Size Instantly (Up to 80%)
Reduce your PDF file size without losing quality. Choose Low, Medium, High or Maximum compression. Free and instant.
Compress PDF
✅ Free · No signupDrop your file here
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Your file is processed locally in your browser — never uploaded to any server
How It Works
Open Compress PDF
Go to curopdf.com/compress-pdf — no account needed.
Upload your PDF
Drag and drop or click to select your file.
Choose compression level
Medium is best for emails. Maximum for WhatsApp or portals with size limits.
Download
Compressed PDF downloads instantly to your device.
How to Compress a PDF Without Losing Quality
CuroPDF's PDF compressor re-renders each page at a reduced image quality setting. Image-heavy PDFs can shrink by up to 80%. Text-only PDFs typically compress 10–30%.
Which compression level should I use?
- Low — Near-original quality. Best for printing and archiving.
- Medium — Best balance of quality and size. Ideal for email and sharing.
- High — Noticeably smaller file. Good for upload portals and cloud storage.
- Maximum — Smallest possible size. Use for WhatsApp, Telegram or strict size limits.
💡 Start with Medium. If the file is still too large, try High or Maximum compression.
Compress PDF free — no subscription, no watermarks
Most PDF compressors add a watermark to the free version. CuroPDF compresses your file with no watermarks, no quality loss warnings and no upgrade prompts. All compression happens in your browser — your documents never leave your device.