How to Compress a PDF File Online
Make any PDF smaller for email, sharing, or uploading without losing quality you can actually see. Three compression levels let you choose exactly how small you need it to be.
Secure server-side processing with 256-bit SSL encryption. Files are permanently deleted right after your download is ready.
Compress Your PDF in 3 Steps
Upload Your PDF
Drag your PDF onto the upload area or click to browse. Files up to 50MB are supported. If your PDF is password protected, you will need to unlock it first. Your file is encrypted with 256-bit SSL the moment it leaves your browser.
Choose a Compression Level
Pick from three levels. Low gives slight compression while keeping the highest quality. Medium, the recommended setting, balances file size and clarity well for most PDFs. High gives you the smallest possible file size with standard quality. Select the one that fits what you need to do with the file.
Download Your Compressed PDF
Click Compress PDF. A progress panel shows three stages in real time: uploading, compressing images and fonts, and finalizing. When complete you will see "Compression Success!" with a before and after size comparison. Download your compressed file and click Start Fresh to compress another.
What Makes This PDF Compressor Worth Using
Three compression levels, a live progress panel, and a before/after size comparison so you know exactly what you got.
Three Compression Levels
Low for high quality with slight size reduction. Medium for the best balance of quality and smaller file size. High for the smallest possible output when quality matters less.
Before and After Comparison
When compression finishes, a card shows your original file size next to the compressed size so you can see exactly how much was saved.
Fast Processing
Most files compress in under 30 seconds. A live progress bar shows each stage so you are never left wondering what is happening.
Quality Preserved
Images are optimised and fonts are streamlined, but text stays sharp and images remain clear and readable.
Secure and Private
256-bit SSL encryption during transfer. Processed in server memory only. Permanently deleted the moment your download is ready.
Always Free
No account, no subscription, no hidden limits. Compress as many PDFs as you need at no cost.
When to Compress a PDF
Common situations where reducing PDF file size makes a real difference:
- Email attachments that keep bouncing back because they are too large.
- Faster uploads to government portals, application forms, or client systems.
- Freeing up storage space from a folder full of large scanned documents.
- Sharing documents on messaging apps like WhatsApp or Telegram that have size limits.
- Submitting applications or forms that impose a strict file size cap.
- Reducing page load time for PDFs embedded in a website.
What Happens to Your File
Your PDF is transferred to our server over an encrypted connection.
It is processed in server memory only. Nothing is written to permanent disk storage.
The compressed PDF is returned to your browser and the server copy is deleted right away.
We never store, share, or have access to your documents at any point.