PDF PremFree PDF Compressor
Need to email or upload a PDF that is too large? PDF Prem's free PDF compressor reduces PDF file size with a simple quality slider and shows a live size estimate before you download — no sign-up, and your files never leave your device.
Drag & drop a PDF here or browse files
PDF files only
No PDF loaded yet.
Move the slider to see a size estimate.
How to use the PDF Compressor
- Upload your PDF — drag and drop it or click the upload area to browse.
- Move the quality slider and watch the live size estimate update instantly.
- Click "Compress & Download" and wait for the progress bar to finish.
- Save the smaller PDF to your device — ready to email or upload anywhere.
Frequently asked questions
Is the PDF compressor really free?
Yes, completely free with no sign-up, no watermarks and no page limits.
Will the text in my PDF stay selectable?
No. Each page is re-rendered as an image at your chosen quality, so text is not selectable in the compressed PDF. This tool works best for scanned documents and image-heavy PDFs.
Is there a maximum PDF size?
The only limit is your browser's memory. Very large PDFs (hundreds of pages) may take a while to process on slower devices.
Are my PDFs uploaded anywhere?
Never. Compression happens 100% in your browser — your files stay private on your device.