Free · Runs in your browser
Note Cleaner Fast
Upload a photo of a handwritten note. Get back crisp dark ink on a pure white background — gaps removed, shadows gone.
Drop your note photo here
or tap to choose a photo from your camera or library
JPG, PNG, HEIC · any size
Ready to clean
All processing happens locally in your browser — your photo is never uploaded anywhere.
Cleaning your note...
Analyzing the image and whitening the background
Convert to grayscale
Build local illumination model
Normalize background to white
Detect blank gaps
Apply final cleanup
How it works
1
Local illumination model
Computes local background brightness using a large Gaussian blur, separating ink from paper even under uneven lighting.
2
Background whitening
Maps each pixel's ratio to its local background: paper becomes pure white (255, 255, 255), ink stays dark.
3
Gap detection
Scans horizontally for large blank regions between content blocks. If a significant gap is found, it's removed.
4
Final cleanup
Near-white smudges are snapped to pure white. Ink gets a slight contrast boost so strokes stay solid and readable.