Compress PDF Online
Reduce the file size of your PDF so it is easier to email and upload. Images are optimized while text stays sharp and selectable.
Your files stay on your device. Conversions run in your browser.
Works best with PDFs that contain photos or scanned pages. PDFs with only text are often already small.
Your files stay on your device. Conversions run in your browser.
- No signup required
- Files stay on your device
- Browser-based conversion
- Fast download
- Free to use
How it works
How to compress a PDF online
- 1
Upload your PDF file.
- 2
Choose a compression level and click “Compress PDF”.
- 3
Download your smaller PDF.
Supported file types: PDF · No signup required
About PDF files
- PDF (Portable Document Format)
- PDF files look the same on every device and are the standard for invoices, statements, contracts and reports. Digital PDFs store real text; scanned PDFs store images of pages. All PDF tools →
Privacy: your files stay on your device
Your files stay on your device. Conversions run in your browser. Sehnna never uploads, stores or reads your documents – there is no server that receives them, no account and no email address.
- Your files stay on your device
- No signup required
- Browser-based conversion
Compress PDF – frequently asked questions
Is this PDF compressor free?
Yes. Compressing PDFs on Sehnna is free, with no signup and no watermark.
How much smaller will my PDF get?
It depends on the content. PDFs with photos or scanned pages often shrink a lot. PDFs that contain only text are usually already small and may not get much smaller.
Will my text still be selectable?
Yes. Sehnna only optimizes the images inside your PDF. Text, links and page layout are kept as they are.
Which compression level should I choose?
“Recommended” keeps images sharp and is good for most documents. “Strong” makes the file even smaller and is ideal for email, but photos may look softer.
Is my PDF uploaded?
No. The compression runs in your browser. Your PDF stays on your device and is never uploaded to a server.