Compress PDF — Reduce File Size Online, Free
Shrink PDF files for email, upload or archiving. Runs in your browser with no uploads and no watermarks.
Private
Browser-only processing
Fast
No signup, no watermark
Universal
Any browser, any device
How it works
- 1
Select PDF files
Click the drop zone and pick one or more PDFs to compress.
- 2
Choose a quality level
Lower quality means a smaller file. 70% is a good default for text-heavy PDFs.
- 3
Download the compressed files
Click Compress — each smaller PDF downloads automatically.
Why compress PDFs online?
PDFs balloon quickly when they include embedded fonts, high-resolution images, and long revision histories. A 40 MB contract or 100 MB scanned brochure will bounce off email attachments and stall uploads. Compressing brings the file back to a manageable size without changing what it looks like.
How EasyPDFViewer compares
Adobe, SmallPDF and iLovePDF all upload your file to compress it. EasyPDFViewer runs entirely client-side using pdf-lib — free, unlimited, and safe for sensitive documents.
Frequently asked questions
How much smaller will my PDF be?
For text-heavy PDFs, expect 10-30% savings from object-stream compression. Image-heavy PDFs may need dedicated image downsampling for larger savings.
Are my files uploaded?
No. Compression runs in your browser with pdf-lib. Your files stay on your device.
Will the compressed PDF still be searchable?
Yes. Text remains selectable and searchable after compression.
Does compression change the visible content?
No. The pages, text, and images look the same — only redundant PDF structure is removed.
Can I compress a password-protected PDF?
Only if you can open it without a password. Use Unlock PDF first if needed.
Is there a file-size limit?
No hard cap. Very large PDFs (>500MB) may hit browser memory limits on lower-end devices.