Compress PDF Online

Compress PDF — Free Online Tool

Shrink PDF file size for email attachments, portals, and faster sharing. Choose compression strength based on whether you need maximum quality or the smallest file.

What You Can Do

• Reduce file size for easier uploading and email.
• Choose a balance between quality and compression.
• Download a smaller PDF without a watermark.

Why Use Compress PDF?

Prepare documents for email, job portals, school submissions, and websites with file-size limits.

How to Use This Tool

1. Step 1. Upload your file using the drag-and-drop area above.
2. Step 2. Adjust any settings, then start processing.
3. Step 3. Download your result instantly — free, with no watermarks.

Best Use Cases

Prepare documents for email, job portals, school submissions, and websites with file-size limits.

File Privacy and Processing

This tool processes your file locally in your browser. The source document is not uploaded to PDFHill for processing, although your browser may download the tool libraries needed to perform the task. Read our file safety overview.

Frequently Asked Questions

How much can PDF compression reduce file size?

Results depend on images, fonts, and page count. Text-heavy PDFs compress more than high-resolution scans.

Can I compress a PDF below 100 KB?

Sometimes, especially for short text documents. Photo-heavy PDFs may need fewer pages or stronger quality reduction.

Will compression ruin readability?

Mild compression usually keeps text clear. Strong compression is best for upload limits, not for high-quality printing.

Is compressing PDFs online safe?

PDFHill compresses files in your browser for this tool, so the document is not uploaded to PDFHill servers.

Helpful guides

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