What is PDF Compressor?
PDF Compressor is a free online tool that reduces the file size of your PDF documents. It works by re-encoding the PDF structure with object streams, removing redundant data, and optimizing the internal layout. All processing happens in your browser — no files are uploaded to any server.
How to Use
- Upload a PDF — Drag & drop or browse to select your file.
- Compress — Click "Compress PDF" and wait a few seconds.
- Download — See the size comparison and download the compressed file.
Common Use Cases
📧 Email Attachments
Reduce PDF size to fit within email attachment limits.
☁️ Cloud Storage
Save storage space by compressing documents before uploading.
🌐 Web Upload
Meet file size limits when uploading to portals and forms.
🔒 100% Private
Your files never leave your device — everything runs in the browser.