TraceLine extracts clean line art from any photo directly in your browser. No uploads, no servers — complete privacy. Key features: - 6 style presets (Normal, SNS, Retro, Warm, Cool, Fade) - Manual draw & erase with Apple Pencil support - Zoom, pan, and full-screen editing on mobile & tablet - Download full image or visible area - 100% local processing — your images never leave your device