Compress PDF

Reduce your PDF file size. Choose compression level — basic, balanced, or maximum. Free, private, all in your browser.

About Compress PDF

Reduce PDF file size by removing metadata, optimizing structure, and using object streams. Choose from three compression levels based on your needs. All processing is done locally in your browser.

Three Compression Levels

Basic removes metadata only. Balanced optimizes structure. Maximum uses aggressive object stream compression.

Metadata Cleanup

Strips title, author, subject, and keywords from the PDF to reduce file size and protect privacy.

Lossless Optimization

PDF content and quality remain unchanged. Only structural optimization is applied.

Private & Secure

Everything runs in your browser with pdf-lib. No uploads, no servers, no tracking.

📋 Common Use Cases

Email Large Documents

Compress bulky PDF reports and presentations to stay under email attachment size limits for faster sending.

Optimize Web Uploads

Reduce PDF sizes before uploading to websites, portals, or cloud storage that have file size restrictions.

Save Storage Space

Shrink archives of scanned documents and invoices to free up cloud storage and speed up backups.

Speed Up Sharing

Create smaller PDFs that upload and download faster when sharing via messaging apps or file transfer services.

🪜 How to Use This Tool

Upload your PDF
Drag and drop your PDF file onto the upload area or click to browse and select the file you want to compress.

Select compression level
Choose from low, medium, or high compression depending on whether file size or quality is your priority.

Preview estimated savings
See the projected file size reduction before downloading, with a side-by-side quality comparison preview.

Download compressed PDF
Save the optimized PDF to your device with reduced file size but still readable quality.

Frequently Asked Questions

Is this PDF tool really free?▼

Yes. Every PDF tool on iluv.tools is completely free. No signup, no account, no payment. Everything runs in your browser.

Are my PDF files uploaded to a server?▼

No. All PDF processing happens locally in your browser using the pdf-lib and PDF.js libraries. Your files never leave your device.

Do these PDF tools work offline?▼

Basic PDF tools (merge, split, compress, rotate, sign, watermark, protect, unlock, add page numbers, edit metadata, flatten, grayscale, crop, delete pages) work completely offline after the page loads. AI-powered tools like smart compression and PDF to Word require an internet connection.

Is there a file size limit?▼

Browser-based tools handle files up to ~100MB smoothly. Larger files may be slower depending on your device. For very large PDFs, try splitting them first, processing the parts, then merging.

Can I use these on mobile?▼

Yes. All PDF tools work on mobile browsers (iOS Safari, Android Chrome). Desktop is recommended for large files, but everything is functional on mobile.