PDF Compressor
Reduce PDF file size in your browser — free, private, and processed entirely locally. No uploads, no signup.
Choose your files
Drop your PDF here
or browse files from your device
Supports PDF files up to browser memory limits
Compressing your PDF...
PDF Compressed!
What Is a PDF Compressor?
A PDF Compressor reduces the file size of a PDF document by re-encoding its pages as optimized images at a chosen quality level. Smaller PDF files are easier to email, upload to websites, and store. The PDF Compressor offers three compression levels — Light, Balanced, and Strong — so you can choose the right trade-off between file size and visual quality.
When Should You Use the PDF Compressor?
- Email large PDFs — Reduce file size to meet email attachment size limits (typically 10-25 MB).
- Upload to websites or portals — Many upload forms have file size limits. Compress your PDF before submitting.
- Save storage space — Compress archived PDFs to reduce storage requirements on your device or cloud storage.
- Faster document sharing — Smaller PDFs upload and download faster, especially on slower connections.
Benefits of Browser-Based PDF Compression
- No Uploads, Complete Privacy — All compression happens directly in your browser. Your PDF never leaves your device.
- Three Compression Levels — Choose from Light (near-original quality), Balanced (good quality with significant reduction), or Strong (smallest file size).
- Instant Results — Compression is processed immediately in your browser with no waiting for uploads or server queues.
- Works on Any Device — Compatible with Windows, Mac, Linux, Android, and iOS.
How It Works
Upload PDF
Drag and drop or click to browse. Works with any PDF file up to browser memory limits.
Choose Compression Level
Pick Light, Balanced, or Strong compression. Each level shows the estimated quality and DPI.
Download Compressed PDF
Click Compress. Your smaller PDF is created instantly in your browser. Nothing is ever uploaded.
PNG to JPG
Convert PNG images to JPG format with quality controls
JPG to PNG
Convert JPG images to lossless PNG format
Frequently Asked Questions
Yes, completely free. No hidden charges, no subscription, no signup required. Compress as many PDFs as you want, as often as you need.
No. All compression happens directly in your browser using JavaScript. Your files never leave your device. We never see your PDFs.
Your PDF is loaded and each page is rendered as an optimized image at the chosen quality level. The pages are then rebuilt into a new, smaller PDF. Text becomes non-selectable but the visual appearance is preserved. This approach gives the most reliable file size reduction.
Three levels: Light (~108 DPI, JPEG quality 82%) — near-original quality, minor size reduction. Balanced (~72 DPI, JPEG quality 65%) — good quality, significant reduction. Strong (~47 DPI, JPEG quality 40%) — smallest file size, lower quality.
No. Since pages are rendered as images during compression, text and interactive elements become non-selectable. For many use cases (scans, archives, email attachments) this is perfectly acceptable. If you need text-selectable output, server-side tools like Ghostscript are required.
Results vary by content. Image-heavy PDFs (scans, brochures, photos) typically see 40-80% reduction. Text-heavy PDFs may see less since they are already highly compressed. Balanced mode is recommended for most files.
Since everything runs in your device's browser, the practical limit depends on your available memory. Very large PDFs (500+ MB or thousands of pages) may cause performance issues on lower-end devices.