Enhance PDF Quality Online Free
Boost the sharpness, contrast, and brightness of a scanned PDF. The tool processes each page individually — the result is visually cleaner and easier to read.
Your file never leaves your computer: everything is processed in the browser, nothing is uploaded.
Three steps — and you're done
The entire process takes under a minute. No software to install, no sign-up required.
Upload your scanned PDF
Drag a PDF or click "choose a file". Best results with text scans that have low contrast or a grey background.
Adjust the settings
Select the enhancement intensity. "Standard" suits most scans; "Strong" is for very light or blurry documents.
Download the enhanced PDF
The finished PDF downloads automatically. Text will be sharper, backgrounds whiter.
Secure, fast, and free
Principles we uphold for every tool we build.
Files never uploaded
The document is processed inside your browser and never uploaded. You can see it yourself on the Network tab of the developer tools.
Works without the internet
Once the page has loaded, no connection is needed. Turn off the network and process a file — the tool keeps working. That is the simplest way to see the document goes nowhere.
No registration needed
No account, email, or password required. Upload a file and get your result instantly.
Works on any device
Fully optimised for phones and tablets — runs right in the browser.
Frequently asked questions
Answers about security, file formats, and limitations.