Whiten scanned PDFs, strip gray/yellow scan noise and shadows, boost text sharpness, and shrink print-ink usage — processed entirely in your browser. Nothing is uploaded to a server.
Cleaning settings (applied to all queued files)
180
Medium — good for typical office/home scans
Preserve colored text & highlights
Only flattens dull gray/beige scan noise to white; colored ink, stamps and highlighter marks are kept intact.
Boost text contrast
Darkens remaining text slightly so pages stay crisp and legible after whitening.
Force A4 page size
Off by default — the tool now keeps each page's original size and orientation automatically.
This tool isolates paper texture and scan shadows using pixel-brightness analysis, then flattens that noise to pure white while leaving genuine ink and images alone.
One or more files are large — cleaning may take a little longer on this device. You can lower "Output quality" to Standard to speed it up.
Want the full guide, tips and FAQ? See the companion article page.