Compress Files
Max 50 files.pdf.jpg.jpeg.pngMax 100 MB each
or drop files here
Compress your PDF to a smaller file size while maintaining quality. The HamsterPDF compressor is free, secure, and browser-based—no installation required.
Reduce PDF size by up to 99%
Fast and secure online PDF compression
No installation or registration required
Shrink PDF Size While Preserving Quality
Compress PDFs online for free while maintaining document quality. Reduce the size of your large files for easy sharing and storage in just a few clicks.
Fast & Effective PDF Compression
Compress your PDF quickly and effortlessly. Simply drag and drop your file, and our compressor will automatically optimize it in seconds.
FastFreeSecure
PDF
Smaller PDFs, Great Quality
Choose between Basic, Standard, and High-Quality PDF compression to find the right balance. Reduce file size without noticeable quality loss.
FastFreeSecure
Basic
Popular
StandardHigh
Secure PDF Compression
Your PDFs are protected with secure encryption while being processed. HamsterPDF is designed with privacy in mind, with files automatically deleted after processing, helping keep your documents private and secure.
FastFreeSecure
Automatically deleted after processing
How To Compress a PDF Online for Free
- 1Drag & drop your file into HamsterPDF's free PDF compressor.
- 2Choose Basic, Standard, or High Quality compression, then click 'Compress'.
- 3If needed, edit your PDF with our other tools.
- 4Download your compressed PDF when you're done.
PDF8.4 MB
BeforeCompress
PDF0.8 MB
AfterEverything You Need in a PDF Compressor
Compress Instantly—No Installation Required
Compress PDFs directly in your browser—no installations, sign-ups, or learning curves. Just upload, compress, and be on your way.
Compress PDFs & Other File Types
Compress more than just PDFs. Use the tool to reduce other file types, such as PDF, JPG, and PNG.
Secure File Encryption
HamsterPDF protects your documents with secure encryption during file transfer and processing.
Automatic File Deletion
Your uploaded files are automatically deleted after processing, helping keep your documents private and secure.
HamsterPDF Compress PDF FAQs
Yes. HamsterPDF lets you compress PDF files online without installing additional software. Simply upload your PDF, choose your compression option, and download the compressed file.
Make Your PDFs Smaller, Faster
Reduce PDF file sizes without unnecessary hassle. HamsterPDF helps you optimize large documents for email, online uploads, and easy sharing while keeping your files perfectly readable.
Up to 99% smaller
Maintains Quality