Compress PDF
Shrink big PDFs so they're easy to share.
Drop a PDF here
Works best on scanned or image-heavy PDFs
Choose fileCompression rebuilds each page as an image, so it shrinks scanned and photo-based PDFs the most. Text-only PDFs are already small and may not get smaller.
About Compress PDF
Compress PDF files online for free. Reduce the size of scanned or image-heavy PDFs right in your browser — nothing is uploaded. Choose your quality level and see the new size instantly.
Because everything runs on your own device, PDFini works offline once loaded, keeps your documents private, and never adds watermarks. Bookmark it for next time.
How to compress pdf
- 1Drop a PDF into the box or click to choose one.
- 2Pick a compression level — Balanced works well for most files.
- 3Click “Compress PDF”, check the new size, then download.
Frequently asked questions
Why didn't my text PDF get smaller?+
Compression works by rebuilding pages as images, which shrinks scanned and photo-heavy PDFs the most. Text-only PDFs are already tiny and may not reduce further.
Which level should I choose?+
Start with Balanced. Use Strong for the smallest file when quality matters less, or Light to keep pages looking their best.
Are my files uploaded to a server?+
No. Every PDFini tool runs entirely in your browser using JavaScript. Your files are read and processed on your own device and are never uploaded, stored or seen by us.