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Free · No Signup · Private

Free Online PDF Enhancer — Improve PDF Quality

Professional PDF enhancement with brightness, contrast, saturation, and sharpness controls. No uploads, 100% private — runs in your browser.

Professional PDF Enhancement
Enhance

Drop your PDF here

tap to browse or drag and drop

PDF · Max 50MB · Single file

Adjustments

100%
100%
100%
0%

Effects

All pages will be enhanced with the same settings

Have a Feature Request?

We're always looking to improve. Tell us what features you'd like to see in the PDF Enhancer tool.

Suggest a Feature
How It Works

Professional Enhancement

01

Upload PDF

Drop or click to select your PDF file.

02

Adjust Settings

Fine-tune brightness, contrast, saturation, and sharpness.

03

Download

Get your enhanced PDF instantly.

Professional PDF Enhancement

Enhance your PDF documents with professional-grade adjustments. All processing happens in your browser — your PDFs never leave your device.

Available Adjustments

  • Brightness — Make dark PDFs brighter or dim bright pages
  • Contrast — Increase the difference between text and background
  • Saturation — Control the intensity of colors
  • Sharpness — Enhance text and image clarity
  • Grayscale — Convert to black and white
  • Sepia — Apply a warm vintage tone

Use Cases

  • Improve scanned documents with low contrast
  • Brighten dark PDF pages for better readability
  • Enhance old or faded PDF documents
  • Make text more crisp and readable
FAQ

Frequently Asked Questions

What enhancements can I apply to PDFs?

You can adjust brightness, contrast, saturation, sharpness, and apply grayscale or sepia effects to all pages in your PDF.

Will my PDF be uploaded?

No. All processing happens in your browser using PDF.js and Canvas API. Your PDF never leaves your device.

Does it work with multi-page PDFs?

Yes. All pages are enhanced with the same settings and compiled into a new PDF document.

What if my PDF is encrypted?

Password-protected PDFs cannot be processed. Please remove the password first and try again.