Restore scanned pages
Enhance scanned PDF
Improve contrast and remove common scan shadows in your browser.
Auto-downloads when done · all image processing runs in the browser sandbox
Output is an image-based cleaned PDF. Original hidden text layers are not preserved.
User guide
How to use Scanned PDF Enhancer
Whiten uneven paper, reduce shadows and dark borders, and rebuild cleaned scan pages locally.
- 1
Upload a scanned PDF.
- 2
Choose a cleanup preset and adjust background and text sensitivity.
- 3
Preview representative pages and process the document.
- 4
Download the enhanced PDF and compare small text with the original.
Best for
- Phone-captured documents
- Yellowed or shadowed paper scans
Important limitation
Enhancement rasterizes pages and can remove faint handwriting, stamps or light graphics when settings are too strong. Keep the original and review every page.
Frequently asked questions
Does it preserve selectable text?
The cleaned visual pages are rasterized; an existing text layer is not guaranteed to remain selectable.
Which preset should I start with?
Use the conservative preset first, then increase strength only if shadows remain.
PDFPerch processes files locally unless this guide explicitly identifies a cloud-dependent feature. Always keep an original copy and verify critical output before submission, printing, signing, or accounting use.