Compress PDF files
Shrink PDFs that are too big to email or upload. Smart mode recompresses the images inside the PDF while keeping text sharp and selectable; extreme mode rasterizes pages for the smallest possible files. Everything runs in your browser.
100% private: files are processed in your browser and never uploaded to any server.
How it works
- Drop one or more PDFs into the box — compression starts automatically in smart mode.
- Adjust the mode or image quality if you need a smaller file, and compress again.
- Download each compressed PDF — the size saving is shown next to every file.
Frequently asked questions
What is the difference between smart and extreme mode?
Smart mode only recompresses the images embedded in the PDF: text stays vector-sharp, selectable and searchable. Extreme mode converts each page into a compressed image — files get much smaller, but text can no longer be selected. Use extreme only when you must hit a strict size limit.
Why did my PDF barely shrink?
If a PDF is mostly text or its images are already highly compressed, smart mode has little left to squeeze. Switch to extreme mode for a guaranteed reduction — at the cost of selectable text.
Does compression reduce visual quality?
Smart mode at the default quality is visually indistinguishable for most documents. Lowering the quality slider trades visible detail for size, which matters mainly for photos and scans.
Is my PDF uploaded to compress it?
No. Compression runs entirely in your browser — your document never leaves your device, no matter how large it is.