Enhance Scanned PDF Online Free - Sharpen Text & Clean Quality |PDFfans | Free Online PDF Tools: Merge, Compress & Convert PDF

enhance scanned pdf quality and sharpen text online free

Upload Your Scanned PDF

Drag & drop a PDF file here or click to browse

Select PDF

Original Page

Preview will appear here

Enhanced Preview

Enhanced version will appear here

Enhancement Controls

Brightness 0

Contrast 0

Sharpness 0

Noise Reduction 0

Black/White Threshold 0

Output Options

Auto-enhance

Preserve colors

Processing...

Processing Progress

Preparing document...

Initializing enhancement process

Turn Blurry Scans into Crisp Docs

Reading low-quality scanned documents or photos taken with a phone can be a strain on the eyes. Shadows, yellowed backgrounds, and blurry text make them unprofessional and hard to print. Our Enhance PDF Tool is designed specifically for Scanned PDFs. It uses intelligent processing to sharpen text edges, remove visual noise (dots and grain), and whiten the background. Whether you have an old book scan or a quick photo of a receipt, PDFFans restores its clarity instantly.

How to Improve PDF Quality:

1. Upload Scan: Drag & drop your scanned PDF file into the upload area or click Select PDF.
2. Choose Level: Select the enhancement strength:
- Light: For documents that just need a small touch-up.
- Standard: Best for most scans to balance clarity and detail.
- Strong: For very blurry or dark documents (use with care).
3. Enhance: Click to process the file and download your optimized, readable PDF.

Why Use This Enhancer?

👁️ Text Clarity: Increases contrast and sharpens edges to make letters distinct and readable.
🧹 Noise Reduction: Removes the "grain" and small dots often seen in low-quality scans.
📄 Background Whitening: Removes the grey or yellow tint of old paper, saving printer ink.
📱 Mobile Friendly: Perfect for fixing documents photographed with a smartphone camera.
🆓 100% Free: Restore unlimited pages without expensive software.

FAQ: Enhancing Scanned PDFs

Q: Does this work on regular digital PDFs (Word-to-PDF)?

A: It is less effective on native digital PDFs because they are already sharp. This tool is optimized for images inside PDFs (scanned papers/photos).

Q: Will the file size increase?

A: Possibly. Enhancing details and sharpening images can sometimes result in a slightly larger file size to maintain the new visual quality.

Q: Which setting should I use for medical scans/X-rays?

A: Use the Light or Standard setting. "Strong" enhancement might remove subtle details that are important in medical images.

Search PDF Tools

Enhance Scanned PDF