Sketch Clean

Turn notebook sketches into crisp line art on a transparent background — ready for colour, lettering, or finishing in your favourite art app. No more grey paper texture or smudged pencil fill: Sketch Clean isolates your lines so you can work digitally without redrawing from scratch. Private by design: processing stays on your device — no upload, no account, no analytics. HOW IT WORKS - Photograph your sketch or pick one from your photo library - Sketch Clean detects the page, corrects perspective, and removes paper tint and shadows - Your clean line art is ready on a transparent background in seconds FEATURES - Transparent PNG export — lines on alpha, ready to layer in Procreate, Clip Studio, Photoshop, or any digital art tool - "On White" export — share a white-background version that looks great anywhere - Automatic page detection and perspective correction — no manual cropping needed - Shadow and tint removal — handles yellowed paper, uneven lighting, and pencil smudge - Sensitivity slider — keep faint construction lines or capture only bold strokes - Preserve tones toggle — retain subtle pencil graduation or output pure black lines - Before/after comparison slider — drag to see the difference - Share directly to other apps via the iOS share sheet COMPLETELY OFFLINE Every step of processing happens on your iPhone or iPad. Your sketches are never uploaded anywhere. No internet connection required. ONE PRICE, NO SURPRISES Sketch Clean is a one-time purchase. No subscriptions, no in-app purchases, no ads. Pay once, use forever. PERFECT FOR - Traditional artists digitising pencil or ink drawings - Illustrators preparing line art for digital colouring - Comic and manga hobbyists cleaning up hand-drawn panels - Letterers extracting hand-drawn type - Anyone who sketches on paper and finishes digitally PRIVACY Sketch Clean collects no data. No analytics, no tracking, no accounts. Your artwork stays on your device.