Compress PDF Online Free

Reduce your PDF file size by up to 90% without losing quality. Three compression levels to choose from. No signup needed.

Compress PDF Now

What Is PDF Compression?

PDF compression reduces the file size of your PDF document by optimizing images, removing redundant data, and streamlining the internal structure. The result is a smaller file that is easier to email, upload, or store, while keeping your content readable and professional-looking.

This is especially useful when you need to email a large PDF that exceeds attachment limits, upload documents to a portal with file size restrictions, save storage space on your device, or speed up file sharing with colleagues and clients. Our compressor gives you full control over the compression level so you can prioritize quality or file size based on your needs.

How to Compress a PDF File

Shrink your PDF in three simple steps.

1

Upload Your PDF

Drag and drop your PDF file or click to browse. We accept files up to 100MB on the free plan.

2

Choose Compression Level

Select Low, Medium, or High compression. Low preserves the most quality, High gives the smallest file size.

3

Download Compressed PDF

Click "Compress" and see the size reduction instantly. Download your optimized, smaller PDF file.

Three Compression Levels

Choose the right balance between file size and quality for your needs.

Low

~20-30% reduction

Minimal compression with near-perfect quality preservation. Ideal for documents with detailed graphics or photos where visual fidelity is critical.

Recommended

Medium

~40-60% reduction

Balanced compression that works for most use cases. Great quality with significantly reduced file size. The best choice for everyday documents.

High

~70-90% reduction

Maximum compression for the smallest possible file size. Perfect for email attachments, web uploads, and archiving where file size is the priority.

Why Use Our PDF Compressor?

Powerful compression with full control over quality.

Up to 90% Smaller

Dramatically reduce file sizes, making PDFs easy to email, upload, and store without hassle.

3 Quality Levels

Choose the compression level that fits your needs. From minimal to maximum, you are always in control.

Fast Processing

Compress your PDF in seconds, not minutes. See the size reduction immediately after processing completes.

Fully Secure

256-bit SSL encryption and immediate file deletion. Your confidential documents remain private at all times.

Frequently Asked Questions

Everything you need to know about compressing PDFs online.

How much can I reduce my PDF file size?
The amount of compression depends on your PDF content. Files with many high-resolution images can be reduced by up to 90%. Text-heavy documents typically see 20-50% reduction. Our tool shows you the exact file size before and after compression so you can see the savings.
Will compressing my PDF reduce the quality?
It depends on the compression level you choose. Our "Low" compression preserves nearly all visual quality while still reducing file size. "Medium" offers a great balance between size and quality suitable for most uses. "High" compression maximizes size reduction and is ideal for email attachments or web uploads where smaller size matters most.
What compression levels are available?
We offer three compression levels: Low (minimal compression, best quality preservation), Medium (balanced compression, recommended for most uses), and High (maximum compression, smallest file size). You can try different levels and compare the results to find the perfect balance for your needs.
What is the maximum file size I can compress?
Free users can upload PDFs up to 100MB. Pro users (one-time €9.99) can compress files up to 500MB. This covers the vast majority of PDF documents people work with daily.
Can I compress password-protected PDFs?
Our tool works with standard PDF files. If your PDF is password-protected, you will need to remove the protection first before uploading. After compression, you can re-apply password protection using your preferred PDF editor.
Is my PDF secure during compression?
Yes. All uploads use 256-bit SSL encryption. Your file is processed in memory on our servers and deleted immediately after the compressed version is ready for download. We never store, read, or share your documents.

Ready to Compress Your PDF?

Reduce your file size in seconds. Choose your compression level and download instantly. Free to use.

Compress PDF Now