Compress PDF

Compress PDF — Reduce File Size Without Losing Quality

Large PDF files are slow to upload, difficult to email, and eat up storage space. DocoLine's PDF compressor intelligently reduces your file size by optimizing images, removing redundant data, and streamlining the document structure — all while keeping your content visually identical.

How to Compress a PDF

1. Upload your PDF — drag and drop or browse. We accept files up to 100 MB.
2. Click "Compress" — our engine analyzes and optimizes your PDF using smart compression algorithms.
3. Download the smaller file — your optimized PDF is ready. Compare the before/after file size to see the savings.

Why Compress PDFs?

• Email Attachments — most email services limit attachments to 25 MB. Compress to fit within limits.
• Faster Uploads — smaller files upload quicker to cloud storage, websites, and document portals.
• Save Storage — reduce the space PDFs consume on your hard drive, cloud, or server.
• Faster Web Loading — compressed PDFs load faster when embedded on websites.
• Submission Requirements — many government and corporate portals enforce file size limits for document uploads.

How It Works

Our compression engine optimizes embedded images (downsampling and re-encoding), removes duplicate objects, strips unnecessary metadata, and compresses content streams — reducing file size by 40-80% on average while maintaining readable text and clear images.

Features

• Smart Compression — balances file size reduction with visual quality automatically.
• 100% Free — no account, no watermarks, no file limits.
• Secure — 256-bit SSL encryption, files permanently deleted within 1 hour.
• Up to 100 MB — handles large PDFs that other tools reject.