PDF Compressor

How to Compress PDF Files Online

Upload PDF File - Click "Select PDF" or drag and drop your PDF file into the upload area. The tool supports files up to 50MB with maximum 100 pages.
Adjust Compression Settings - Choose your desired compression level using the quality slider or select a preset. Adjust additional options like grayscale conversion and resolution as needed.
Preview Compression - Click "Preview First Page" to see how your document will look after compression. This helps you find the right balance between file size and quality.
Compress PDF - Click "Compress PDF" to start the compression process. The tool will optimize images and reduce file size while maintaining readability.
Download Result - Download your compressed PDF file. The tool shows you exactly how much space you've saved compared to the original file.

All processing happens locally in your browser - your files are never uploaded to any server, ensuring complete privacy and security.

Why Choose Our PDF Compressor

100% Secure

Files never leave your browser - maximum privacy protection

Smart Compression

Intelligent algorithms that optimize images without visible quality loss

Fast Processing

Optimized for speed - compress large PDFs in seconds

Quality Control

Adjustable quality settings with live preview

No Registration

Use immediately without creating an account or login

Mobile Friendly

Works perfectly on all devices - desktop, tablet, and mobile

Completely Free

No hidden costs, no watermarks, unlimited compression

Batch Options

Multiple compression settings for different use cases

Frequently Asked Questions

Is PDF compression safe for my documents?

Yes, PDF compression is completely safe. Our tool uses lossy compression for images only, which reduces file size while maintaining text clarity. The original file remains unchanged on your device.

What's the maximum file size I can compress?

You can compress PDF files up to 50MB in size with a maximum of 100 pages. This limit ensures smooth processing in your browser. For larger files, consider using our desktop software or splitting the PDF first.

Will compressed PDFs work for printing?

For standard printing, compressed PDFs work perfectly. For high-quality professional printing, choose the "High (For Printing)" preset which maintains 300 DPI resolution. Always preview before printing important documents.

How much can I reduce PDF file size?

Typical compression reduces file size by 30-80% depending on content. Image-heavy PDFs compress more (50-80%), while text-based PDFs compress less (30-50%). Our tool shows estimated savings before compression.

Does compression affect text searchability?

No, text remains searchable and selectable after compression. Our compression only optimizes images within the PDF. Text layers are preserved, so you can still copy, search, and highlight text.

Are my files secure during compression?

Absolutely! All processing happens locally in your browser using JavaScript. Your PDF files never leave your computer or get uploaded to any server, ensuring complete privacy and security.

Compression Settings

Page Preview