Grayscale compression
Remove document color when a smaller practical copy matters more.
PDFShrink • Local image-based compression
-Compress PDF Online Privately
Reduce PDF file size with adjustable quality, entirely inside your browser.
Top toolThree ways it saves you time
Three compression levels
Choose strong, balanced or light processing for the document.
Reduction report
See original size, new size and the exact percentage reduction.
Using this tool
Balance file size against readable detail
Choose a compression level and process the PDF locally. PDFShrink renders each page as a compressed image, which is effective for scans and image-heavy documents but removes selectable text, links and interactive form fields.
Reading the output
Smaller pages lose interactive content
An image-heavy scanned assignment
A scanned assignment made from high-resolution phone photos can often become much smaller at Balanced quality while remaining clear enough to read on screen.
Pages rendered and re-encoded
Each page is rendered at a controlled resolution, encoded as JPEG and placed into a new PDF. Stronger settings use fewer pixels and lower image quality.
Keep the original document
- Use Balanced first and inspect small text before sharing.
- Keep the original because compressed output cannot restore lost detail.
- Avoid this tool when selectable text, links, signatures or form fields must remain interactive.
Before relying on the result
Compression limits and selectable text
Why is the text no longer selectable?
PDFShrink compresses by turning each page into an image. This is disclosed before processing and works best for scanned documents.
Will every PDF become smaller?
No. PDFs that are already optimized or mostly text can stay similar in size or occasionally become larger.