Free PDF Compressor - Reduce PDF File Size Online | Privacy First

Reduce PDF file size directly in your browser. 100% free, secure, and privacy-focused - no uploads, no servers, no file size limits.

100% Free Private & Secure No Limits Works Offline

or drag & drop PDF here

Custom Quality 70%
30% - Max Compression 100% - Original Quality

How to Compress PDF Files

1

Upload PDF File

Click "Select PDF" or drag and drop your PDF file into the upload zone. The file is processed entirely in your browser.

2

Choose Compression Level

Select from High, Medium, or Low compression presets, or use the custom slider to fine-tune the quality from 30% to 100%.

3

Compress PDF

Click "Compress PDF" and watch the progress as each page is optimized. The tool shows real-time compression status.

4

Download Result

See the before/after file sizes and percentage saved. Download your compressed PDF instantly to your device.

Why Use Our PDF Compressor?

Complete Privacy

Your PDF is processed entirely in your browser. No files are uploaded to any server. Your documents stay on your device, ensuring 100% privacy and security.

Fast Compression

Reduce PDF file size in seconds without waiting for uploads or downloads. The compression happens on your device for instant results.

Always Free

No hidden costs, no subscriptions, no premium features. Compress unlimited PDFs completely free with no file size restrictions.

Adjustable Quality

Choose from High, Medium, or Low compression presets or use the custom slider for precise control. Balance file size with document quality.

Reduce Up to 70%

Significantly reduce PDF file size while maintaining readability. Perfect for email attachments, web uploads, and storage optimization.

Works Everywhere

Use on any device - desktop, laptop, tablet, or smartphone. Works on Windows, Mac, Linux, iOS, and Android. No app installation needed.

Common Use Cases for PDF Compression

📧 Email Attachments

Reduce PDF size to meet email attachment limits. Most email providers limit attachments to 25MB - compress large PDFs to send them easily.

🌐 Website Uploads

Optimize PDFs for faster website loading. Smaller files improve page speed, user experience, and SEO rankings.

💾 Storage Optimization

Save disk space by compressing archived documents. Reduce cloud storage costs and free up local drive space.

📱 Mobile Sharing

Share documents faster on mobile networks. Compressed PDFs use less data and transfer more quickly on slower connections.

Frequently Asked Questions

Is this PDF compressor really free? ▼
Yes! Our PDF compressor is 100% free with no hidden costs, subscriptions, or premium features. You can compress unlimited PDFs without any restrictions.
Are my PDFs uploaded to a server? ▼
No! All PDF compression happens locally in your browser. Your files never leave your device, ensuring complete privacy and security. This also means the tool works offline.
How much can I reduce my PDF file size? ▼
You can typically reduce PDF size by 40-70% depending on the content and compression level chosen. Image-heavy PDFs see the most compression, while text-only PDFs compress less.
Will compression reduce PDF quality? ▼
Some quality loss is normal with compression. Use the adjustable slider to balance file size with quality. The "Medium" preset (70% quality) offers the best balance for most use cases.
Is there a file size limit? ▼
Since everything is processed in your browser, the only limit is your device's available memory. Most modern devices can handle PDFs up to several hundred megabytes.
Does this work on mobile devices? ▼
Yes! Our compressor works on all devices including smartphones and tablets. It's fully responsive and optimized for mobile browsers on iOS and Android.

Start Compressing PDFs Now

Join thousands of users who trust our free, secure, and privacy-first PDF compressor. No registration required. No credit card needed. Just select your PDF and compress!

Compress PDF Now →