Scan PDF Cleaner
Enhance scanned PDF readability
No upload · 100% in your browserThe scan PDF cleaner raises contrast on faded documents for readable, OCR-friendly results. Adjust brightness and threshold to cut background noise and sharpen characters.
How to use
- Upload the scanned PDF.
- Adjust brightness for overall tone.
- Use threshold to clean background/text contrast.
- Generate and download the cleaned PDF.
When it helps
- Cleaning up faded contract scans
- Improving readability of receipts and notes
- Boosting OCR recognition accuracy
Good to know
Too high a threshold can erase thin characters. Adjust gradually using the first-page preview as a guide.
Frequently asked questions
Does it help OCR?
Higher contrast and less noise improve recognition accuracy.
Characters disappear.
Lower the threshold to reduce thin-character loss.
Do color documents work?
Brightness and threshold adjustments clean them for readability.
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