Compress PDF
Reduce the file size with low, medium or high compression.
Runs in your browser (WebAssembly)
Zero server storage
Your files are never written to disk.
In-memory processing
In-Memory Stream / Client WASM: processed in your browser's memory.
100% privacy & security guarantee
No server uploads; your files are never shared with anyone. How it works
Use PDF compression to send large PDFs by e-mail or to fit the size limit of application portals. Images are resized and recompressed according to the level you choose, while text and vector drawings stay exactly the same. If the file cannot be made smaller, your original is returned unchanged.
How to reduce PDF size
- Choose your PDF.
- Choose the compression level: low, medium (recommended) or high.
- Press "Compress PDF" and download the smaller file.
Frequently asked questions
Which level should I choose?
"Medium" is a good balance for most documents. Choose "High" for the smallest file or "Low" when image quality matters most.
Does text quality drop?
No. Only images are recompressed; text and vector drawings stay as they are and the text remains searchable.
Do scanned PDFs get smaller?
Yes, scanned documents usually shrink the most; high-resolution scans often become several times smaller.