🎛️ Noise Reduction Tool

Luminance noise appears as grainy texture — brightness variations that look like film grain. Color noise appears as colored speckles (red, green, blue dots) that are especially visible in shadow areas of high-ISO photos. Our tool handles both separately for optimal results. For most photos, start with Luminance 40-60 and Color 20-40.

The Night Photo preset (Luminance 70, Color 45, Detail 40, Radius 3, Sharp 15) is optimized for high-ISO images with significant noise. It balances aggressive noise reduction with detail preservation. For extremely noisy images (ISO 6400+), try the Aggressive preset then reduce settings if needed.

Detail Preservation controls how much the algorithm protects edges and fine details during denoising. Higher values (60-80%) keep edges sharp but may leave some noise. Lower values (20-40%) smooth more aggressively but can blur details. For portraits, use higher detail preservation (60-70%). For landscapes, moderate values (40-60%) work well.

Detection Radius controls how many pixels the algorithm analyzes to detect noise. Larger radius (3-5) creates stronger noise reduction but may blur more. Smaller radius (1-2) preserves detail but may leave some noise. Start with Radius 2 and increase if noise persists after adjusting Luminance and Color Noise.

Denoising naturally softens image details. Post-Sharpening (0-100%) restores edge contrast and crispness that may have been lost during noise reduction. Start with 20-30% and increase if the image looks too soft. Be careful with high values as they can reintroduce artifacts.

Absolutely! All processing happens locally in your browser using JavaScript Canvas API. Your images never leave your device — no uploads, no servers, no third parties. This makes it 100% secure for personal photos, client work, and any sensitive images.