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.
Drop your PDF here
tap to browse or drag and drop
PDF · Max 50MB · Single file
Enhancing...
Adjustments
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 FeatureProfessional Enhancement
Upload PDF
Drop or click to select your PDF file.
Adjust Settings
Fine-tune brightness, contrast, saturation, and sharpness.
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
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.
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