Compress PDF
Reduce file size with quality presets.
Select a PDF to compress
or drag & drop a file to browse from your device
How to use Compress PDF online free
- Upload the PDF you want to compress.
- Pick a quality preset — smaller file or higher quality.
- Download your compressed PDF instantly.
Why use PDFdecor?
- 100% free — no sign-up, no watermark, no trial limits.
- Private by design — files are encrypted in transit and auto-deleted after 2 hours.
- Works everywhere — Windows, Mac, Linux, Android, and iPhone, right in your browser.
- No software to install — no Adobe Acrobat needed.
Frequently asked questions
How do I reduce a PDF's file size?
Upload your PDF to PDFdecor's free compressor, pick a quality preset, and download. We rebuild the file with optimized images so it's small enough for email, forms, and portals.
Will compressing lower my PDF's quality?
You control the trade-off with quality presets. The 'balanced' preset is usually visually identical while cutting size dramatically — and we never return a file bigger than the original.
Is it free to compress PDF files online?
Yes. PDFdecor lets you compress PDF files completely free — no sign-up, no watermarks, and no software to install. It works in your browser on Windows, Mac, Linux, Android, and iPhone.
Are my files safe?
Yes. Files are transferred over an encrypted connection and automatically deleted from our servers after 2 hours. Nobody can access your documents.
Do I need to install any software?
No. PDFdecor runs entirely online in your web browser, so you can compress PDF files without installing Adobe Acrobat or any other desktop software.