Private processing on your device
Compress a PDF
Reduce the size of scanned and image-heavy PDF files for easier uploading.
Choose a PDF
Best for scanned forms, certificates and image-heavy PDFs.
PDF stays in your browser
Reduce PDF size
Choose the balance between clarity and file size.
Pages are rebuilt as images. The document will look the same, but text and links may no longer be selectable.
Free, private browser tool
How to use Compress PDF Online
Reduce the size of scanned and image-heavy PDFs for email and online upload limits. Choose a balance between clarity and file size.
- 1
Choose a scanned or image-heavy PDF.
- 2
Select balanced, strong or maximum compression.
- 3
Compare the sizes and download the result.
Useful for
- Meet an online form's size limit
- Make scanned documents easier to email
- Reduce storage used by image-heavy PDFs
Before you start
- Pages are rebuilt as images, so text and links may stop being selectable.
- Maximum compression can soften small text.
- The PDF stays in your browser.
Frequently asked questions
Which PDFs compress best?
Scanned and image-heavy PDFs usually show the biggest reduction.
Which level should I use?
Start with Balanced. Use stronger levels for strict upload limits.
Will text remain selectable?
Not necessarily, because pages are rebuilt as images.
Is the PDF uploaded?
No. Processing happens locally in your browser.
Your files stay with you
Conversions and PDF changes happen on your device. Image & PDF Tools does not receive, store or view the files you choose.